12131323400 has 96 divisors (see below), whose sum is σ = 32984466240. Its totient is φ = 4062562560.

The previous prime is 12131323397. The next prime is 12131323423. The reversal of 12131323400 is 432313121.

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

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, 40559 + ... + 160958.

It is an arithmetic number, because the mean of its divisors is an integer number (343588190).

Almost surely, 2^12131323400 is an apocalyptic number.

12131323400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131323400 is an abundant number, since it is smaller than the sum of its proper divisors (20853142840).

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

12131323400 is a wasteful number, since it uses less digits than its factorization.

12131323400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201583 (or 201574 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12131323400 its reverse (432313121), we get a palindrome (12563636521).

The spelling of 12131323400 in words is "twelve billion, one hundred thirty-one million, three hundred twenty-three thousand, four hundred".