12131031200 has 36 divisors (see below), whose sum is σ = 29614881870. Its totient is φ = 4852412160.

The previous prime is 12131031191. The next prime is 12131031247. The reversal of 12131031200 is 213013121.

It can be written as a sum of positive squares in 3 ways, for example, as 4415868304 + 7715162896 = 66452^2 + 87836^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7581095 + ... + 7582694.

Almost surely, 2^12131031200 is an apocalyptic number.

12131031200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131031200 is an abundant number, since it is smaller than the sum of its proper divisors (17483850670).

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

12131031200 is a wasteful number, since it uses less digits than its factorization.

12131031200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15163809 (or 15163796 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12131031200 its reverse (213013121), we get a palindrome (12344044321).

The spelling of 12131031200 in words is "twelve billion, one hundred thirty-one million, thirty-one thousand, two hundred".