22222121212 has 6 divisors (see below), whose sum is σ = 38888712128. Its totient is φ = 11111060604.

The previous prime is 22222121179. The next prime is 22222121221. The reversal of 22222121212 is 21212122222.

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 22222121212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777765148 + ... + 2777765155.

Almost surely, 2^22222121212 is an apocalyptic number.

It is an amenable number.

22222121212 is a deficient number, since it is larger than the sum of its proper divisors (16666590916).

22222121212 is a wasteful number, since it uses less digits than its factorization.

22222121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555530307 (or 5555530305 counting only the distinct ones).

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

Adding to 22222121212 its reverse (21212122222), we get a palindrome (43434243434).

The spelling of 22222121212 in words is "twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".