12117005379 has 20 divisors (see below), whose sum is σ = 18442241136. Its totient is φ = 7925585616.

The previous prime is 12117005353. The next prime is 12117005399. The reversal of 12117005379 is 97350071121.

12117005379 is a `hidden beast` number, since 1 + 2 + 117 + 0 + 0 + 537 + 9 = 666.

It is not a de Polignac number, because 12117005379 - 2¹⁶ = 12116939843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12117005339) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1406959 + ... + 1415544.

Almost surely, 2^12117005379 is an apocalyptic number.

12117005379 is a deficient number, since it is larger than the sum of its proper divisors (6325235757).

12117005379 is an equidigital number, since it uses as much as digits as its factorization.

12117005379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822568 (or 2822559 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The spelling of 12117005379 in words is "twelve billion, one hundred seventeen million, five thousand, three hundred seventy-nine".