12120225920 has 128 divisors (see below), whose sum is σ = 31658515200. Its totient is φ = 4400455680.

The previous prime is 12120225911. The next prime is 12120225941. The reversal of 12120225920 is 2952202121.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 12120225920.

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, 7313732 + ... + 7315388.

It is an arithmetic number, because the mean of its divisors is an integer number (247332150).

Almost surely, 2^12120225920 is an apocalyptic number.

12120225920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12120225920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15829257600).

12120225920 is an abundant number, since it is smaller than the sum of its proper divisors (19538289280).

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

12120225920 is a wasteful number, since it uses less digits than its factorization.

12120225920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726 (or 2714 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 12120225920 in words is "twelve billion, one hundred twenty million, two hundred twenty-five thousand, nine hundred twenty".