12331312 has 40 divisors (see below), whose sum is σ = 28498176. Its totient is φ = 5054016.

The previous prime is 12331309. The next prime is 12331337. The reversal of 12331312 is 21313321.

It is a super-2 number, since 2×12331312² = 304122511282688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 183 + ... + 4969.

Almost surely, 2^12331312 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 12331312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14249088).

12331312 is an abundant number, since it is smaller than the sum of its proper divisors (16166864).

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

12331312 is a wasteful number, since it uses less digits than its factorization.

12331312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825 (or 4819 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 12331312 is about 3511.5967877876. The cubic root of 12331312 is about 231.0307362136.

Adding to 12331312 its reverse (21313321), we get a palindrome (33644633).

Subtracting 12331312 from its reverse (21313321), we obtain a square (8982009 = 2997²).

The spelling of 12331312 in words is "twelve million, three hundred thirty-one thousand, three hundred twelve".