12918079091 has 2 divisors, whose sum is σ = 12918079092. Its totient is φ = 12918079090.

The previous prime is 12918079019. The next prime is 12918079103. The reversal of 12918079091 is 19097081921.

Together with previous prime (12918079019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (19097081921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12918079091 - 2²² = 12913884787 is a prime.

It is not a weakly prime, because it can be changed into another prime (12918079591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459039545 + 6459039546.

It is an arithmetic number, because the mean of its divisors is an integer number (6459039546).

Almost surely, 2^12918079091 is an apocalyptic number.

12918079091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12918079091 is an equidigital number, since it uses as much as digits as its factorization.

12918079091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 47.

The spelling of 12918079091 in words is "twelve billion, nine hundred eighteen million, seventy-nine thousand, ninety-one".