12126136689 has 12 divisors (see below), whose sum is σ = 17519400756. Its totient is φ = 8082304992.

The previous prime is 12126136681. The next prime is 12126136709. The reversal of 12126136689 is 98663162121.

12126136689 is a `hidden beast` number, since 1 + 21 + 2 + 613 + 6 + 6 + 8 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 373842225 + 11752294464 = 19335^2 + 108408^2 .

It is not a de Polignac number, because 12126136689 - 2³ = 12126136681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12126136681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105174 + ... + 187919.

It is an arithmetic number, because the mean of its divisors is an integer number (1459950063).

Almost surely, 2^12126136689 is an apocalyptic number.

It is an amenable number.

12126136689 is a deficient number, since it is larger than the sum of its proper divisors (5393264067).

12126136689 is a wasteful number, since it uses less digits than its factorization.

12126136689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297696 (or 297693 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The spelling of 12126136689 in words is "twelve billion, one hundred twenty-six million, one hundred thirty-six thousand, six hundred eighty-nine".