12133113231 has 32 divisors (see below), whose sum is σ = 17565907968. Its totient is φ = 7419202560.

The previous prime is 12133113211. The next prime is 12133113247. The reversal of 12133113231 is 13231133121.

It is a happy number.

It is not a de Polignac number, because 12133113231 - 2⁵ = 12133113199 is a prime.

It is a super-2 number, since 2×12133113231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12133113198 and 12133113207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133113211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2345610 + ... + 2350776.

It is an arithmetic number, because the mean of its divisors is an integer number (548934624).

Almost surely, 2^12133113231 is an apocalyptic number.

12133113231 is a deficient number, since it is larger than the sum of its proper divisors (5432794737).

12133113231 is a wasteful number, since it uses less digits than its factorization.

12133113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6351.

The product of its digits is 324, while the sum is 21.

Adding to 12133113231 its reverse (13231133121), we get a palindrome (25364246352).

The spelling of 12133113231 in words is "twelve billion, one hundred thirty-three million, one hundred thirteen thousand, two hundred thirty-one".