12131251400 has 48 divisors (see below), whose sum is σ = 28484465940. Its totient is φ = 4804448000.

The previous prime is 12131251393. The next prime is 12131251409. The reversal of 12131251400 is 415213121.

It can be written as a sum of positive squares in 6 ways, for example, as 9597337156 + 2533914244 = 97966^2 + 50338^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (12131251409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280079 + ... + 320478.

Almost surely, 2^12131251400 is an apocalyptic number.

12131251400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131251400 is an abundant number, since it is smaller than the sum of its proper divisors (16353214540).

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

12131251400 is a wasteful number, since it uses less digits than its factorization.

12131251400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600674 (or 600665 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 12131251400 its reverse (415213121), we get a palindrome (12546464521).

The spelling of 12131251400 in words is "twelve billion, one hundred thirty-one million, two hundred fifty-one thousand, four hundred".