Q: Is 21,111 a Prime Number?
A: No, 21,111 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 21111 can be evenly divided by 1 3 31 93 227 681 7,037 and 21,111, with no remainder.
Since 21,111 cannot be divided by just 1 and 21,111, it is not a prime number.