123004513931081 has 2 divisors, whose sum is σ = 123004513931082. Its totient is φ = 123004513931080.

The previous prime is 123004513931059. The next prime is 123004513931087. The reversal of 123004513931081 is 180139315400321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122114102775625 + 890411155456 = 11050525^2 + 943616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123004513931081 is a prime.

It is a super-2 number, since 2×123004513931081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123004513931087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61502256965540 + 61502256965541.

It is an arithmetic number, because the mean of its divisors is an integer number (61502256965541).

Almost surely, 2^{123004513931081} is an apocalyptic number.

It is an amenable number.

123004513931081 is a deficient number, since it is larger than the sum of its proper divisors (1).

123004513931081 is an equidigital number, since it uses as much as digits as its factorization.

123004513931081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 123004513931081 in words is "one hundred twenty-three trillion, four billion, five hundred thirteen million, nine hundred thirty-one thousand, eighty-one".