12117138459 has 8 divisors (see below), whose sum is σ = 16175818752. Its totient is φ = 8068275240.

The previous prime is 12117138427. The next prime is 12117138497. The reversal of 12117138459 is 95483171121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12117138459 - 2⁵ = 12117138427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12117138459.

It is not an unprimeable number, because it can be changed into a prime (12117138419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2451387 + ... + 2456324.

It is an arithmetic number, because the mean of its divisors is an integer number (2021977344).

Almost surely, 2^12117138459 is an apocalyptic number.

12117138459 is a deficient number, since it is larger than the sum of its proper divisors (4058680293).

12117138459 is an equidigital number, since it uses as much as digits as its factorization.

12117138459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908537.

The product of its digits is 60480, while the sum is 42.

The spelling of 12117138459 in words is "twelve billion, one hundred seventeen million, one hundred thirty-eight thousand, four hundred fifty-nine".