12313321132 has 72 divisors (see below), whose sum is σ = 25700068800. Its totient is φ = 5144622336.

The previous prime is 12313321099. The next prime is 12313321157. The reversal of 12313321132 is 23112331321.

It is a super-2 number, since 2×12313321132² (a number of 21 digits) contains 22 as substring.

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, 2475544 + ... + 2480512.

It is an arithmetic number, because the mean of its divisors is an integer number (356945400).

Almost surely, 2^12313321132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12313321132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12850034400).

12313321132 is an abundant number, since it is smaller than the sum of its proper divisors (13386747668).

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

12313321132 is a wasteful number, since it uses less digits than its factorization.

12313321132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303 (or 5294 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 12313321132 its reverse (23112331321), we get a palindrome (35425652453).

The spelling of 12313321132 in words is "twelve billion, three hundred thirteen million, three hundred twenty-one thousand, one hundred thirty-two".