123015231135169 has 2 divisors, whose sum is σ = 123015231135170. Its totient is φ = 123015231135168.

The previous prime is 123015231135157. The next prime is 123015231135271. The reversal of 123015231135169 is 961531132510321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121517287686144 + 1497943449025 = 11023488^2 + 1223905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123015231135169 is a prime.

It is a super-2 number, since 2×123015231135169² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123015231136169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61507615567584 + 61507615567585.

It is an arithmetic number, because the mean of its divisors is an integer number (61507615567585).

Almost surely, 2^{123015231135169} is an apocalyptic number.

It is an amenable number.

123015231135169 is a deficient number, since it is larger than the sum of its proper divisors (1).

123015231135169 is an equidigital number, since it uses as much as digits as its factorization.

123015231135169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 123015231135169 in words is "one hundred twenty-three trillion, fifteen billion, two hundred thirty-one million, one hundred thirty-five thousand, one hundred sixty-nine".