12031331111312 has 20 divisors (see below), whose sum is σ = 23351103879756. Its totient is φ = 6005239787520.

The previous prime is 12031331111309. The next prime is 12031331111321. The reversal of 12031331111312 is 21311113313021.

It can be written as a sum of positive squares in 2 ways, for example, as 10844007064576 + 1187324046736 = 3293024^2 + 1089644^2 .

It is a super-2 number, since 2×12031331111312² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651600989 + ... + 651619452.

Almost surely, 2^{12031331111312} is an apocalyptic number.

It is an amenable number.

12031331111312 is a deficient number, since it is larger than the sum of its proper divisors (11319772768444).

12031331111312 is a wasteful number, since it uses less digits than its factorization.

12031331111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303221026 (or 1303221020 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 12031331111312 its reverse (21311113313021), we get a palindrome (33342444424333).

The spelling of 12031331111312 in words is "twelve trillion, thirty-one billion, three hundred thirty-one million, one hundred eleven thousand, three hundred twelve".