Q: Is 100,821 a Prime Number?
A: No, 100,821 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 100821 can be evenly divided by 1 3 7 21 4,801 14,403 33,607 and 100,821, with no remainder.
Since 100,821 cannot be divided by just 1 and 100,821, it is not a prime number.