22222112212 has 12 divisors (see below), whose sum is σ = 39136396180. Its totient is φ = 11040284736.

The previous prime is 22222112183. The next prime is 22222112219. The reversal of 22222112212 is 21221122222.

It can be written as a sum of positive squares in 2 ways, for example, as 13984008516 + 8238103696 = 118254^2 + 90764^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 22222112212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222112219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17692137 + ... + 17693392.

Almost surely, 2^22222112212 is an apocalyptic number.

It is an amenable number.

22222112212 is a deficient number, since it is larger than the sum of its proper divisors (16914283968).

22222112212 is a wasteful number, since it uses less digits than its factorization.

22222112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35385690 (or 35385688 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

Adding to 22222112212 its reverse (21221122222), we get a palindrome (43443234434).

The spelling of 22222112212 in words is "twenty-two billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twelve".