123231034402561 has 2 divisors, whose sum is σ = 123231034402562. Its totient is φ = 123231034402560.

The previous prime is 123231034402439. The next prime is 123231034402573. The reversal of 123231034402561 is 165204430132321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123204316865536 + 26717537025 = 11099744^2 + 163455^2 .

It is a cyclic number.

It is not a de Polignac number, because 123231034402561 - 2⁴¹ = 121032011147009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123231034402561.

It is not a weakly prime, because it can be changed into another prime (123231034402361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61615517201280 + 61615517201281.

It is an arithmetic number, because the mean of its divisors is an integer number (61615517201281).

Almost surely, 2^{123231034402561} is an apocalyptic number.

It is an amenable number.

123231034402561 is a deficient number, since it is larger than the sum of its proper divisors (1).

123231034402561 is an equidigital number, since it uses as much as digits as its factorization.

123231034402561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 123231034402561 its reverse (165204430132321), we get a palindrome (288435464534882).

The spelling of 123231034402561 in words is "one hundred twenty-three trillion, two hundred thirty-one billion, thirty-four million, four hundred two thousand, five hundred sixty-one".