12138139916 has 12 divisors (see below), whose sum is σ = 24276279888. Its totient is φ = 5202059952.

The previous prime is 12138139883. The next prime is 12138139919. The reversal of 12138139916 is 61993183121.

12138139916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

12138139916 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12138139919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216752471 + ... + 216752526.

It is an arithmetic number, because the mean of its divisors is an integer number (2023023324).

Almost surely, 2^12138139916 is an apocalyptic number.

It is an amenable number.

12138139916 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12138139916 is a wasteful number, since it uses less digits than its factorization.

12138139916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433505008 (or 433505006 counting only the distinct ones).

The product of its digits is 69984, while the sum is 44.

The spelling of 12138139916 in words is "twelve billion, one hundred thirty-eight million, one hundred thirty-nine thousand, nine hundred sixteen".