12013123112 has 16 divisors (see below), whose sum is σ = 22723940340. Its totient is φ = 5953405696.

The previous prime is 12013123093. The next prime is 12013123139. The reversal of 12013123112 is 21132131021.

It can be written as a sum of positive squares in 2 ways, for example, as 10858890436 + 1154232676 = 104206^2 + 33974^2 .

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, 6643523 + ... + 6645330.

Almost surely, 2^12013123112 is an apocalyptic number.

It is an amenable number.

12013123112 is a deficient number, since it is larger than the sum of its proper divisors (10710817228).

12013123112 is a wasteful number, since it uses less digits than its factorization.

12013123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13288972 (or 13288968 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12013123112 its reverse (21132131021), we get a palindrome (33145254133).

The spelling of 12013123112 in words is "twelve billion, thirteen million, one hundred twenty-three thousand, one hundred twelve".