Q: Is 221,420 a Prime Number?
A: No, 221,420 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 221420 can be evenly divided by 1 2 4 5 10 20 11,071 22,142 44,284 55,355 110,710 and 221,420, with no remainder.
Since 221,420 cannot be divided by just 1 and 221,420, it is not a prime number.