12131233400 has 96 divisors (see below), whose sum is σ = 33136160400. Its totient is φ = 4072012800.

The previous prime is 12131233393. The next prime is 12131233417. The reversal of 12131233400 is 433213121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183485 + ... + 240684.

Almost surely, 2^12131233400 is an apocalyptic number.

12131233400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131233400 is an abundant number, since it is smaller than the sum of its proper divisors (21004927000).

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

12131233400 is a wasteful number, since it uses less digits than its factorization.

12131233400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424209 (or 424200 counting only the distinct ones).

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

Adding to 12131233400 its reverse (433213121), we get a palindrome (12564446521).

The spelling of 12131233400 in words is "twelve billion, one hundred thirty-one million, two hundred thirty-three thousand, four hundred".