22120111211212 has 12 divisors (see below), whose sum is σ = 44240222422480. Its totient is φ = 9480047661936.

The previous prime is 22120111211131. The next prime is 22120111211221. The reversal of 22120111211212 is 21211211102122.

It is a happy number.

22120111211212 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 22120111211212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395001985887 + ... + 395001985942.

Almost surely, 2^{22120111211212} is an apocalyptic number.

It is an amenable number.

22120111211212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22120111211212 is a wasteful number, since it uses less digits than its factorization.

22120111211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790003971840 (or 790003971838 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22120111211212 its reverse (21211211102122), we get a palindrome (43331322313334).

The spelling of 22120111211212 in words is "twenty-two trillion, one hundred twenty billion, one hundred eleven million, two hundred eleven thousand, two hundred twelve".