22220211212 has 6 divisors (see below), whose sum is σ = 38885369628. Its totient is φ = 11110105604.

The previous prime is 22220211203. The next prime is 22220211227. The reversal of 22220211212 is 21211202222.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777526398 + ... + 2777526405.

It is an arithmetic number, because the mean of its divisors is an integer number (6480894938).

Almost surely, 2^22220211212 is an apocalyptic number.

It is an amenable number.

22220211212 is a deficient number, since it is larger than the sum of its proper divisors (16665158416).

22220211212 is a wasteful number, since it uses less digits than its factorization.

22220211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555052807 (or 5555052805 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22220211212 its reverse (21211202222), we get a palindrome (43431413434).

The spelling of 22220211212 in words is "twenty-two billion, two hundred twenty million, two hundred eleven thousand, two hundred twelve".