22120223212 has 6 divisors (see below), whose sum is σ = 38710390628. Its totient is φ = 11060111604.

The previous prime is 22120223207. The next prime is 22120223219. The reversal of 22120223212 is 21232202122.

It is a self number, because there is not a number n which added to its sum of digits gives 22120223212.

It is not an unprimeable number, because it can be changed into a prime (22120223219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765027898 + ... + 2765027905.

Almost surely, 2^22120223212 is an apocalyptic number.

It is an amenable number.

22120223212 is a deficient number, since it is larger than the sum of its proper divisors (16590167416).

22120223212 is a wasteful number, since it uses less digits than its factorization.

22120223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530055807 (or 5530055805 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22120223212 its reverse (21232202122), we get a palindrome (43352425334).

The spelling of 22120223212 in words is "twenty-two billion, one hundred twenty million, two hundred twenty-three thousand, two hundred twelve".