What is the factorial of 421? (421!) 421 Factorial

What is the factorial of 421?

Here we will show you how to calculate the factorial of 421 (aka 421 factorial) and give you the approximate scientific notation answer and the exact answer.

Before we begin, note that the factorial of 421 can be written as 421 followed by an exclamation mark like this: 421!

Factorial of 421 means that you multiply 421 by every number below it. Therefore, you calculate the factorial of 421 by multiplying 421 by 420, then by 419, and so on all the way down to 1. In other words, we calculate 421 × 420 × 419 × ... × 1 to get 421 factorial.

The answer to 421 factorial (421!) contains 924 digits and we have listed the exact entire answer at the bottom of this page. However, below is the approximate scientific notation answer to 421 factorial:

4.9670943841 × 10⁹²³

The answer above is also sometimes written as 4.9670943841e+923. Regardless, it means that the approximate answer to 421! is 49670943841 followed by 913 more digits.

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Like we promised, below is the exact answer to 421 factorial (421!) with all 924 digits:

496709438418428047101555454724916745085465336888090097405467818180922261398842295425806822589714833795213495222240007671066490851554749892134937936656282994637909051947398340526149934808106330096692953599944767716258342891428727319048480424750506254845534889774433360425470710774683290442555783815659955875264427528929575675931563437214692758482302503124210528001023359804355899661904496934663897310150700949162282909151225143677669059060838583122439585977518160297232827264016830876225940821782638126030221442411154489855932639983840488927885300335833913419474049335611983897922046477193331977853760794988593293683296748209719217136728920867862297531494704044484830900817732903201945049906982980655481012268737891556187874734833673235166827039350174863501581347262465477415340389373595437779322143694446268466299687403520000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

What is the factorial of 422?
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