12220021120 has 32 divisors (see below), whose sum is σ = 29213489520. Its totient is φ = 4888008192.

The previous prime is 12220021111. The next prime is 12220021127. The reversal of 12220021120 is 2112002221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 12220021120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220021127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9546252 + ... + 9547531.

Almost surely, 2^12220021120 is an apocalyptic number.

12220021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220021120 is an abundant number, since it is smaller than the sum of its proper divisors (16993468400).

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

12220021120 is an equidigital number, since it uses as much as digits as its factorization.

12220021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19093802 (or 19093790 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12220021120 its reverse (2112002221), we get a palindrome (14332023341).

The spelling of 12220021120 in words is "twelve billion, two hundred twenty million, twenty-one thousand, one hundred twenty".