12312131300 has 72 divisors (see below), whose sum is σ = 30964268160. Its totient is φ = 4161830400.

The previous prime is 12312131291. The next prime is 12312131317. The reversal of 12312131300 is 313121321.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74165 + ... + 173564.

It is an arithmetic number, because the mean of its divisors is an integer number (430059280).

Almost surely, 2^12312131300 is an apocalyptic number.

12312131300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312131300 is an abundant number, since it is smaller than the sum of its proper divisors (18652136860).

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

12312131300 is a wasteful number, since it uses less digits than its factorization.

12312131300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247821 (or 247814 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12312131300 its reverse (313121321), we get a palindrome (12625252621).

The spelling of 12312131300 in words is "twelve billion, three hundred twelve million, one hundred thirty-one thousand, three hundred".