12123818656979 has 2 divisors, whose sum is σ = 12123818656980. Its totient is φ = 12123818656978.

The previous prime is 12123818656909. The next prime is 12123818656987. The reversal of 12123818656979 is 97965681832121.

It is a strong prime.

It is an emirp because it is prime and its reverse (97965681832121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123818656979 is a prime.

It is not a weakly prime, because it can be changed into another prime (12123818656909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061909328489 + 6061909328490.

It is an arithmetic number, because the mean of its divisors is an integer number (6061909328490).

Almost surely, 2^{12123818656979} is an apocalyptic number.

12123818656979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123818656979 is an equidigital number, since it uses as much as digits as its factorization.

12123818656979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78382080, while the sum is 68.

The spelling of 12123818656979 in words is "twelve trillion, one hundred twenty-three billion, eight hundred eighteen million, six hundred fifty-six thousand, nine hundred seventy-nine".