12931025220 has 192 divisors, whose sum is σ = 41026540800. Its totient is φ = 3380382720.

The previous prime is 12931025207. The next prime is 12931025227. The reversal of 12931025220 is 2252013921.

It is a happy number.

12931025220 is a `hidden beast` number, since 129 + 3 + 10 + 2 + 522 + 0 = 666.

It is a super-2 number, since 2×12931025220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12931025227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15053151 + ... + 15054009.

It is an arithmetic number, because the mean of its divisors is an integer number (213679900).

Almost surely, 2^12931025220 is an apocalyptic number.

12931025220 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 12931025220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20513270400).

12931025220 is an abundant number, since it is smaller than the sum of its proper divisors (28095515580).

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

12931025220 is a wasteful number, since it uses less digits than its factorization.

12931025220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 12931025220 in words is "twelve billion, nine hundred thirty-one million, twenty-five thousand, two hundred twenty".