222222012120121 has 16 divisors (see below), whose sum is σ = 240130711867536. Its totient is φ = 204429971506176.

The previous prime is 222222012120013. The next prime is 222222012120133. The reversal of 222222012120121 is 121021210222222.

It can be written as a sum of positive squares in 8 ways, for example, as 6595959427600 + 215626052692521 = 2568260^2 + 14684211^2 .

It is not a de Polignac number, because 222222012120121 - 2⁷ = 222222012119993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222222012120092 and 222222012120101.

It is not an unprimeable number, because it can be changed into a prime (222222012121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13805511 + ... + 25199923.

It is an arithmetic number, because the mean of its divisors is an integer number (15008169491721).

Almost surely, 2^{222222012120121} is an apocalyptic number.

It is an amenable number.

222222012120121 is a deficient number, since it is larger than the sum of its proper divisors (17908699747415).

222222012120121 is a wasteful number, since it uses less digits than its factorization.

222222012120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11399532.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222222012120121 its reverse (121021210222222), we get a palindrome (343243222342343).

The spelling of 222222012120121 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, twelve million, one hundred twenty thousand, one hundred twenty-one".