22222222112212 has 12 divisors (see below), whose sum is σ = 38888946887616. Its totient is φ = 11111094430040.

The previous prime is 22222222112171. The next prime is 22222222112227. The reversal of 22222222112212 is 21221122222222.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 858418 + ... + 6721705.

It is an arithmetic number, because the mean of its divisors is an integer number (3240745573968).

Almost surely, 2^{22222222112212} is an apocalyptic number.

It is an amenable number.

22222222112212 is a deficient number, since it is larger than the sum of its proper divisors (16666724775404).

22222222112212 is a wasteful number, since it uses less digits than its factorization.

22222222112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8313038 (or 8313036 counting only the distinct ones).

The product of its digits is 2048, while the sum is 25.

Adding to 22222222112212 its reverse (21221122222222), we get a palindrome (43443344334434).

The spelling of 22222222112212 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twelve".