22013221312 has 14 divisors (see below), whose sum is σ = 43682486168. Its totient is φ = 11006610624.

The previous prime is 22013221291. The next prime is 22013221319. The reversal of 22013221312 is 21312231022.

It is a self number, because there is not a number n which added to its sum of digits gives 22013221312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013221319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171978228 + ... + 171978355.

Almost surely, 2^22013221312 is an apocalyptic number.

It is an amenable number.

22013221312 is a deficient number, since it is larger than the sum of its proper divisors (21669264856).

22013221312 is an equidigital number, since it uses as much as digits as its factorization.

22013221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343956595 (or 343956585 counting only the distinct ones).

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

Adding to 22013221312 its reverse (21312231022), we get a palindrome (43325452334).

The spelling of 22013221312 in words is "twenty-two billion, thirteen million, two hundred twenty-one thousand, three hundred twelve".