220220999 has 2 divisors, whose sum is σ = 220221000. Its totient is φ = 220220998.

The previous prime is 220220951. The next prime is 220221007. The reversal of 220220999 is 999022022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220220999 - 2¹² = 220216903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220220909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110499 + 110110500.

It is an arithmetic number, because the mean of its divisors is an integer number (110110500).

Almost surely, 2^220220999 is an apocalyptic number.

220220999 is a deficient number, since it is larger than the sum of its proper divisors (1).

220220999 is an equidigital number, since it uses as much as digits as its factorization.

220220999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 220220999 is about 14839.8449789747. The cubic root of 220220999 is about 603.8831468095.

The spelling of 220220999 in words is "two hundred twenty million, two hundred twenty thousand, nine hundred ninety-nine".