22222211212 has 24 divisors (see below), whose sum is σ = 39632782896. Its totient is φ = 10898666688.

The previous prime is 22222211203. The next prime is 22222211239. The reversal of 22222211212 is 21211222222.

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 22222211212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992323 + ... + 1014469.

It is an arithmetic number, because the mean of its divisors is an integer number (1651365954).

Almost surely, 2^22222211212 is an apocalyptic number.

It is an amenable number.

22222211212 is a deficient number, since it is larger than the sum of its proper divisors (17410571684).

22222211212 is a wasteful number, since it uses less digits than its factorization.

22222211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26937 (or 26935 counting only the distinct ones).

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

Adding to 22222211212 its reverse (21211222222), we get a palindrome (43433433434).

The spelling of 22222211212 in words is "twenty-two billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twelve".