Q: Is 21,222 a Prime Number?
A: No, 21,222 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 21222 can be evenly divided by 1 2 3 6 9 18 27 54 81 131 162 262 393 786 1,179 2,358 3,537 7,074 10,611 and 21,222, with no remainder.
Since 21,222 cannot be divided by just 1 and 21,222, it is not a prime number.