22221220122012 has 48 divisors (see below), whose sum is σ = 52560456977952. Its totient is φ = 7305512647680.

The previous prime is 22221220121833. The next prime is 22221220122047. The reversal of 22221220122012 is 21022102212222.

It is a super-2 number, since 2×22221220122012² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22221220122012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111868462 + ... + 112066922.

It is an arithmetic number, because the mean of its divisors is an integer number (1095009520374).

Almost surely, 2^{22221220122012} is an apocalyptic number.

It is an amenable number.

22221220122012 is an abundant number, since it is smaller than the sum of its proper divisors (30339236855940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22221220122012 is a wasteful number, since it uses less digits than its factorization.

22221220122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326358 (or 326356 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22221220122012 its reverse (21022102212222), we get a palindrome (43243322334234).

The spelling of 22221220122012 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, twelve".