12131333400 has 96 divisors (see below), whose sum is σ = 37684641600. Its totient is φ = 3228355200.

The previous prime is 12131333387. The next prime is 12131333411. The reversal of 12131333400 is 433313121.

It is a congruent number.

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, 274011 + ... + 315189.

It is an arithmetic number, because the mean of its divisors is an integer number (392548350).

Almost surely, 2^12131333400 is an apocalyptic number.

12131333400 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 12131333400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18842320800).

12131333400 is an abundant number, since it is smaller than the sum of its proper divisors (25553308200).

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

12131333400 is a wasteful number, since it uses less digits than its factorization.

12131333400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41689 (or 41680 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12131333400 its reverse (433313121), we get a palindrome (12564646521).

The spelling of 12131333400 in words is "twelve billion, one hundred thirty-one million, three hundred thirty-three thousand, four hundred".