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421! Factorial of 421

Value of 421! i.e, Factorial of 421 =
49670943841842804710
15554547249167450854
65336888090097405467
81818092226139884229
54258068225897148337
95213495222240007671
06649085155474989213
49379366562829946379
09051947398340526149
93480810633009669295
35999447677162583428
91428727319048480424
75050625484553488977
44333604254707107746
83290442555783815659
95587526442752892957
56759315634372146927
58482302503124210528
00102335980435589966
19044969346638973101
50700949162282909151
22514367766905906083
85831224395859775181
60297232827264016830
87622594082178263812
60302214424111544898
55932639983840488927
88530033583391341947
40493356119838979220
46477193331977853760
79498859329368329674
82097192171367289208
67862297531494704044
48483090081773290320
19450499069829806554
81012268737891556187
87473483367323516682
70393501748635015813
47262465477415340389
37359543777932214369
44462684662996874035
20000000000000000000
00000000000000000000
00000000000000000000
00000000000000000000
00000000000000000000
0000



In general, the factorial of a number N = N*(N-1)*(N-2)....1
Factorial of a non-negative integer n is the product of all positive integers less than or equal to n. Factorials are commonly encountered in permutations, combinations, number theory and series expansions of trigonometric and other functions (Taylor series).

Number of trailing zeros in 421! = 103
To understand factorials, you might find it useful to read the Factorial tutorial over here.
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