222212120121 has 16 divisors (see below), whose sum is σ = 343516321920. Its totient is φ = 141700482000.

The previous prime is 222212120093. The next prime is 222212120131. The reversal of 222212120121 is 121021212222.

It is a happy number.

It is not a de Polignac number, because 222212120121 - 2⁶ = 222212120057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222212120094 and 222212120103.

It is not an unprimeable number, because it can be changed into a prime (222212120131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178914130 + ... + 178915371.

It is an arithmetic number, because the mean of its divisors is an integer number (21469770120).

Almost surely, 2^222212120121 is an apocalyptic number.

It is an amenable number.

222212120121 is a deficient number, since it is larger than the sum of its proper divisors (121304201799).

222212120121 is a wasteful number, since it uses less digits than its factorization.

222212120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357829533 (or 357829527 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222212120121 its reverse (121021212222), we get a palindrome (343233332343).

The spelling of 222212120121 in words is "two hundred twenty-two billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-one".