12315018979 has 2 divisors, whose sum is σ = 12315018980. Its totient is φ = 12315018978.

The previous prime is 12315018953. The next prime is 12315019019. The reversal of 12315018979 is 97981051321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12315018979 - 2⁷ = 12315018851 is a prime.

It is not a weakly prime, because it can be changed into another prime (12315018379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157509489 + 6157509490.

It is an arithmetic number, because the mean of its divisors is an integer number (6157509490).

Almost surely, 2^12315018979 is an apocalyptic number.

12315018979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315018979 is an equidigital number, since it uses as much as digits as its factorization.

12315018979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 46.

It can be divided in two parts, 123150 and 18979, that added together give a square (142129 = 377²).

The spelling of 12315018979 in words is "twelve billion, three hundred fifteen million, eighteen thousand, nine hundred seventy-nine".