12221000120 has 64 divisors (see below), whose sum is σ = 33273996480. Its totient is φ = 3943581696.

The previous prime is 12221000111. The next prime is 12221000179. The reversal of 12221000120 is 2100012221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1278959 + ... + 1288478.

It is an arithmetic number, because the mean of its divisors is an integer number (519906195).

Almost surely, 2^12221000120 is an apocalyptic number.

12221000120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221000120 is an abundant number, since it is smaller than the sum of its proper divisors (21052996360).

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

12221000120 is a wasteful number, since it uses less digits than its factorization.

12221000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567472 (or 2567468 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12221000120 its reverse (2100012221), we get a palindrome (14321012341).

The spelling of 12221000120 in words is "twelve billion, two hundred twenty-one million, one hundred twenty", and thus it is an aban number.