Q: Is 21,223 a Prime Number?
A: No, 21,223 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 21223 can be evenly divided by 1 19 1,117 and 21,223, with no remainder.
Since 21,223 cannot be divided by just 1 and 21,223, it is not a prime number.