123115299971 has 2 divisors, whose sum is σ = 123115299972. Its totient is φ = 123115299970.

The previous prime is 123115299929. The next prime is 123115300019. The reversal of 123115299971 is 179992511321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123115299971 - 2³⁰ = 122041558147 is a prime.

It is not a weakly prime, because it can be changed into another prime (123115299071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61557649985 + 61557649986.

It is an arithmetic number, because the mean of its divisors is an integer number (61557649986).

Almost surely, 2^123115299971 is an apocalyptic number.

123115299971 is a deficient number, since it is larger than the sum of its proper divisors (1).

123115299971 is an equidigital number, since it uses as much as digits as its factorization.

123115299971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 50.

The spelling of 123115299971 in words is "one hundred twenty-three billion, one hundred fifteen million, two hundred ninety-nine thousand, nine hundred seventy-one".