What is the factorial of 1020? (1020!) 1020 Factorial

What is the factorial of 1020?

Here we will show you how to calculate the factorial of 1020 (aka 1020 factorial) and give you the approximate scientific notation answer and the exact answer.

Before we begin, note that the factorial of 1020 can be written as 1020 followed by an exclamation mark like this: 1020!

Factorial of 1020 means that you multiply 1020 by every number below it. Therefore, you calculate the factorial of 1020 by multiplying 1020 by 1019, then by 1018, and so on all the way down to 1. In other words, we calculate 1020 × 1019 × 1018 × ... × 1 to get 1020 factorial.

The answer to 1020 factorial (1020!) contains 2628 digits and we have listed the exact entire answer at the bottom of this page. However, below is the approximate scientific notation answer to 1020 factorial:

4.9571168635 × 10²⁶²⁷

The answer above is also sometimes written as 4.9571168635e+2627. Regardless, it means that the approximate answer to 1020! is 49571168635 followed by 2617 more digits.

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Like we promised, below is the exact answer to 1020 factorial (1020!) with all 2628 digits:

495711686351639193773210783935508599967193812971557935364863691944470223358915090366269100180330234872803827608284137529747334498102087842000654494331876648800970728361307682481776959128900957177413590597965794092910403488145761377098525324023508990067767282343838478050787283572604415908509119742107196724215953292313644915831489615785484391971963523405927910421017966336454320320441831824824944604996539190237346448561537427251334754639423702789262693545523800640906696657921844088370453074725139420955959541690085517931651878503605013736983188996291806658857460633101860968204750336261330581216890921602812806437160430597858190592228921009774732860666636874238518206869954266279983928306836797452763695722676124915966018053224057374434854000827889307988349781015132443520460202490973437807128104812760101378051029582024149593984550917222563537860033788954948419465281275635535343394824561576602468030624708028470876687083056603164203950869792485263483550965451414223339353827003939084759336207364260766727894105318713181959161804913544382557559700045998062604361969936978102323838300087333974768312969140441961115048063033663058761039825092514056499257657170192502971959438325685411040135578513777263193470000316441985851425551287566127029485378438864829472066821520298907903010108437381352385692634058825409866106848832544838999499099117418954232228512576242184330789412215385243664928067630035340295085042453598596137854826567891025728059139061709704358212531643359888874225371664842690400732100564143038531401141945742973890530336619949101435259868005989204537227214517455755081841433860832368437055803650428609457002876995908345026731173265171978900636091694711057211141857525237731767468722092326590290117415574889961483301643438395966522383541702596902346591484429027748357129241246476629333263030808897081675674431848666409122170179902214071667793092709919475814843614866385282764173524210243518396581118518163129579365431006199383760851055851538606747200282046835555477844371601871293165766991588699706043663382035307239695796222503869716253317136980544202168084393582378972631406356890971975046938380011411592552188039636586702614787489989555962442033187998649804283785834425443126186537941206418604554240186090531687964869568792037571195840178652923444476118701857333482210844224497186610715843056877004497795934551499384354410066065589926352687698997420312494080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

What is the factorial of 1021?
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