12131403320 has 32 divisors (see below), whose sum is σ = 28901286000. Its totient is φ = 4567116288.

The previous prime is 12131403299. The next prime is 12131403331. The reversal of 12131403320 is 2330413121.

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

It is a junction number, because it is equal to n+sod(n) for n = 12131403292 and 12131403301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8919470 + ... + 8920829.

Almost surely, 2^12131403320 is an apocalyptic number.

12131403320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131403320 is an abundant number, since it is smaller than the sum of its proper divisors (16769882680).

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

12131403320 is a wasteful number, since it uses less digits than its factorization.

12131403320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17840327 (or 17840323 counting only the distinct ones).

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

Adding to 12131403320 its reverse (2330413121), we get a palindrome (14461816441).

The spelling of 12131403320 in words is "twelve billion, one hundred thirty-one million, four hundred three thousand, three hundred twenty".