12311321232 has 40 divisors (see below), whose sum is σ = 36347711296. Its totient is φ = 3517520256.

The previous prime is 12311321227. The next prime is 12311321257. The reversal of 12311321232 is 23212311321.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12311321199 and 12311321208.

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, 18320083 + ... + 18320754.

Almost surely, 2^12311321232 is an apocalyptic number.

12311321232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12311321232 is an abundant number, since it is smaller than the sum of its proper divisors (24036390064).

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

12311321232 is a wasteful number, since it uses less digits than its factorization.

12311321232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36640855 (or 36640849 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 12311321232 its reverse (23212311321), we get a palindrome (35523632553).

The spelling of 12311321232 in words is "twelve billion, three hundred eleven million, three hundred twenty-one thousand, two hundred thirty-two".