22122211112212 has 6 divisors (see below), whose sum is σ = 38713869446378. Its totient is φ = 11061105556104.

The previous prime is 22122211112203. The next prime is 22122211112263. The reversal of 22122211112212 is 21221111222122.

It can be written as a sum of positive squares in only one way, i.e., 18892010092036 + 3230201020176 = 4346494^2 + 1797276^2 .

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 as a sum of consecutive naturals, namely, 2765276389023 + ... + 2765276389030.

Almost surely, 2^{22122211112212} is an apocalyptic number.

It is an amenable number.

22122211112212 is a deficient number, since it is larger than the sum of its proper divisors (16591658334166).

22122211112212 is a wasteful number, since it uses less digits than its factorization.

22122211112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530552778057 (or 5530552778055 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

Adding to 22122211112212 its reverse (21221111222122), we get a palindrome (43343322334334).

The spelling of 22122211112212 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred eleven million, one hundred twelve thousand, two hundred twelve".