12117287379 has 4 divisors (see below), whose sum is σ = 16156383176. Its totient is φ = 8078191584.

The previous prime is 12117287341. The next prime is 12117287393. The reversal of 12117287379 is 97378271121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97378271121 = 3 ⋅32459423707.

It is not a de Polignac number, because 12117287379 - 2¹¹ = 12117285331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12117287779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2019547894 + ... + 2019547899.

It is an arithmetic number, because the mean of its divisors is an integer number (4039095794).

Almost surely, 2^12117287379 is an apocalyptic number.

12117287379 is a deficient number, since it is larger than the sum of its proper divisors (4039095797).

12117287379 is an equidigital number, since it uses as much as digits as its factorization.

12117287379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039095796.

The product of its digits is 296352, while the sum is 48.

The spelling of 12117287379 in words is "twelve billion, one hundred seventeen million, two hundred eighty-seven thousand, three hundred seventy-nine".