12312011331 has 24 divisors (see below), whose sum is σ = 18310868784. Its totient is φ = 7965967680.

The previous prime is 12312011329. The next prime is 12312011333. The reversal of 12312011331 is 13311021321.

12312011331 is a `hidden beast` number, since 12 + 312 + 0 + 11 + 331 = 666.

It is an interprime number because it is at equal distance from previous prime (12312011329) and next prime (12312011333).

It is not a de Polignac number, because 12312011331 - 2¹ = 12312011329 is a prime.

It is a super-3 number, since 3×12312011331³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12312011333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85636 + ... + 178766.

It is an arithmetic number, because the mean of its divisors is an integer number (762952866).

Almost surely, 2^12312011331 is an apocalyptic number.

12312011331 is a deficient number, since it is larger than the sum of its proper divisors (5998857453).

12312011331 is a wasteful number, since it uses less digits than its factorization.

12312011331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93571 (or 93568 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 12312011331 its reverse (13311021321), we get a palindrome (25623032652).

The spelling of 12312011331 in words is "twelve billion, three hundred twelve million, eleven thousand, three hundred thirty-one".