12303131232 has 192 divisors, whose sum is σ = 37727907840. Its totient is φ = 3437861376.

The previous prime is 12303131219. The next prime is 12303131263. The reversal of 12303131232 is 23213130321.

It is a super-2 number, since 2×12303131232² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 12303131199 and 12303131208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8999413 + ... + 9000779.

It is an arithmetic number, because the mean of its divisors is an integer number (196499520).

Almost surely, 2^12303131232 is an apocalyptic number.

12303131232 is a gapful number since it is divisible by the number (12) 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 12303131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18863953920).

12303131232 is an abundant number, since it is smaller than the sum of its proper divisors (25424776608).

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

12303131232 is a wasteful number, since it uses less digits than its factorization.

12303131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673 (or 1665 counting only the distinct ones).

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

Adding to 12303131232 its reverse (23213130321), we get a palindrome (35516261553).

The spelling of 12303131232 in words is "twelve billion, three hundred three million, one hundred thirty-one thousand, two hundred thirty-two".