12138582912 has 32 divisors (see below), whose sum is σ = 32243111880. Its totient is φ = 4046194176.

The previous prime is 12138582901. The next prime is 12138582941. The reversal of 12138582912 is 21928583121.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×12138582912² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 15805063 + ... + 15805830.

Almost surely, 2^12138582912 is an apocalyptic number.

12138582912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12138582912 is an abundant number, since it is smaller than the sum of its proper divisors (20104528968).

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

12138582912 is an equidigital number, since it uses as much as digits as its factorization.

12138582912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31610910 (or 31610898 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The spelling of 12138582912 in words is "twelve billion, one hundred thirty-eight million, five hundred eighty-two thousand, nine hundred twelve".