Q: Is 21,321 a Prime Number?
A: No, 21,321 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 21321 can be evenly divided by 1 3 9 23 69 103 207 309 927 2,369 7,107 and 21,321, with no remainder.
Since 21,321 cannot be divided by just 1 and 21,321, it is not a prime number.