12220912220 has 24 divisors (see below), whose sum is σ = 27996999408. Its totient is φ = 4443968000.

The previous prime is 12220912219. The next prime is 12220912237. The reversal of 12220912220 is 2221902221.

It is a congruent number.

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, 27774581 + ... + 27775020.

It is an arithmetic number, because the mean of its divisors is an integer number (1166541642).

Almost surely, 2^12220912220 is an apocalyptic number.

12220912220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220912220 is an abundant number, since it is smaller than the sum of its proper divisors (15776087188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12220912220 is a wasteful number, since it uses less digits than its factorization.

12220912220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55549621 (or 55549619 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Subtracting from 12220912220 its reverse (2221902221), we obtain a palindrome (9999009999).

The spelling of 12220912220 in words is "twelve billion, two hundred twenty million, nine hundred twelve thousand, two hundred twenty".