222082921 has 2 divisors, whose sum is σ = 222082922. Its totient is φ = 222082920.

The previous prime is 222082919. The next prime is 222082961. The reversal of 222082921 is 129280222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208658025 + 13424896 = 14445^2 + 3664^2 .

It is a cyclic number.

It is not a de Polignac number, because 222082921 - 2¹ = 222082919 is a prime.

Together with 222082919, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 222082921.

It is not a weakly prime, because it can be changed into another prime (222082901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111041460 + 111041461.

It is an arithmetic number, because the mean of its divisors is an integer number (111041461).

Almost surely, 2^222082921 is an apocalyptic number.

It is an amenable number.

222082921 is a deficient number, since it is larger than the sum of its proper divisors (1).

222082921 is an equidigital number, since it uses as much as digits as its factorization.

222082921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 222082921 is about 14902.4468125204. The cubic root of 222082921 is about 605.5802742627.

The spelling of 222082921 in words is "two hundred twenty-two million, eighty-two thousand, nine hundred twenty-one".