12115523112 has 64 divisors (see below), whose sum is σ = 37762675200. Its totient is φ = 3146888640.

The previous prime is 12115523099. The next prime is 12115523129. The reversal of 12115523112 is 21132551121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3276162 + ... + 3279857.

It is an arithmetic number, because the mean of its divisors is an integer number (590041800).

Almost surely, 2^12115523112 is an apocalyptic number.

12115523112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12115523112 is an abundant number, since it is smaller than the sum of its proper divisors (25647152088).

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

12115523112 is a wasteful number, since it uses less digits than its factorization.

12115523112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6556046 (or 6556042 counting only the distinct ones).

The product of its digits is 600, while the sum is 24.

The spelling of 12115523112 in words is "twelve billion, one hundred fifteen million, five hundred twenty-three thousand, one hundred twelve".