222055021 has 2 divisors, whose sum is σ = 222055022. Its totient is φ = 222055020.

The previous prime is 222054997. The next prime is 222055027. The reversal of 222055021 is 120550222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145684900 + 76370121 = 12070^2 + 8739^2 .

It is a cyclic number.

It is not a de Polignac number, because 222055021 - 2⁹ = 222054509 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222055021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222055027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111027510 + 111027511.

It is an arithmetic number, because the mean of its divisors is an integer number (111027511).

Almost surely, 2^222055021 is an apocalyptic number.

It is an amenable number.

222055021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222055021 is an equidigital number, since it uses as much as digits as its factorization.

222055021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 222055021 is about 14901.5106952282. The cubic root of 222055021 is about 605.5549137695.

The spelling of 222055021 in words is "two hundred twenty-two million, fifty-five thousand, twenty-one".