123301505140021 has 16 divisors (see below), whose sum is σ = 132913450116720. Its totient is φ = 113707745141760.

The previous prime is 123301505139997. The next prime is 123301505140027. The reversal of 123301505140021 is 120041505103321.

It can be written as a sum of positive squares in 8 ways, for example, as 38787498217521 + 84514006922500 = 6227961^2 + 9193150^2 .

It is a cyclic number.

It is not a de Polignac number, because 123301505140021 - 2²⁷ = 123301370922293 is a prime.

It is a super-2 number, since 2×123301505140021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123301505140027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266209191 + ... + 266671963.

It is an arithmetic number, because the mean of its divisors is an integer number (8307090632295).

Almost surely, 2^{123301505140021} is an apocalyptic number.

It is an amenable number.

123301505140021 is a deficient number, since it is larger than the sum of its proper divisors (9611944976699).

123301505140021 is a wasteful number, since it uses less digits than its factorization.

123301505140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482376.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 123301505140021 in words is "one hundred twenty-three trillion, three hundred one billion, five hundred five million, one hundred forty thousand, twenty-one".