222012122121 has 24 divisors (see below), whose sum is σ = 325670776704. Its totient is φ = 145709292960.

The previous prime is 222012122119. The next prime is 222012122179. The reversal of 222012122121 is 121221210222.

It is a happy number.

It is not a de Polignac number, because 222012122121 - 2¹ = 222012122119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222012122094 and 222012122103.

It is not an unprimeable number, because it can be changed into a prime (222012127121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 874656 + ... + 1099566.

It is an arithmetic number, because the mean of its divisors is an integer number (13569615696).

Almost surely, 2^222012122121 is an apocalyptic number.

It is an amenable number.

222012122121 is a deficient number, since it is larger than the sum of its proper divisors (103658654583).

222012122121 is a wasteful number, since it uses less digits than its factorization.

222012122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226621 (or 226618 counting only the distinct ones).

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

Adding to 222012122121 its reverse (121221210222), we get a palindrome (343233332343).

The spelling of 222012122121 in words is "two hundred twenty-two billion, twelve million, one hundred twenty-two thousand, one hundred twenty-one".