22123031212 has 6 divisors (see below), whose sum is σ = 38715304628. Its totient is φ = 11061515604.

The previous prime is 22123031191. The next prime is 22123031221. The reversal of 22123031212 is 21213032122.

It is a self number, because there is not a number n which added to its sum of digits gives 22123031212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765378898 + ... + 2765378905.

Almost surely, 2^22123031212 is an apocalyptic number.

It is an amenable number.

22123031212 is a deficient number, since it is larger than the sum of its proper divisors (16592273416).

22123031212 is a wasteful number, since it uses less digits than its factorization.

22123031212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530757807 (or 5530757805 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22123031212 its reverse (21213032122), we get a palindrome (43336063334).

The spelling of 22123031212 in words is "twenty-two billion, one hundred twenty-three million, thirty-one thousand, two hundred twelve".