123031011979 has 2 divisors, whose sum is σ = 123031011980. Its totient is φ = 123031011978.

The previous prime is 123031011973. The next prime is 123031012007. The reversal of 123031011979 is 979110130321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123031011979 - 2¹⁹ = 123030487691 is a prime.

It is not a weakly prime, because it can be changed into another prime (123031011973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515505989 + 61515505990.

It is an arithmetic number, because the mean of its divisors is an integer number (61515505990).

Almost surely, 2^123031011979 is an apocalyptic number.

123031011979 is a deficient number, since it is larger than the sum of its proper divisors (1).

123031011979 is an equidigital number, since it uses as much as digits as its factorization.

123031011979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 37.

The spelling of 123031011979 in words is "one hundred twenty-three billion, thirty-one million, eleven thousand, nine hundred seventy-nine".