123410545242521 has 4 divisors (see below), whose sum is σ = 123574873532544. Its totient is φ = 123246216952500.

The previous prime is 123410545242487. The next prime is 123410545242533. The reversal of 123410545242521 is 125242545014321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123410545242521 - 2¹⁰ = 123410545241497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123410545241521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82164143885 + ... + 82164145386.

It is an arithmetic number, because the mean of its divisors is an integer number (30893718383136).

Almost surely, 2^{123410545242521} is an apocalyptic number.

It is an amenable number.

123410545242521 is a deficient number, since it is larger than the sum of its proper divisors (164328290023).

123410545242521 is an equidigital number, since it uses as much as digits as its factorization.

123410545242521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164328290022.

The product of its (nonzero) digits is 384000, while the sum is 41.

The spelling of 123410545242521 in words is "one hundred twenty-three trillion, four hundred ten billion, five hundred forty-five million, two hundred forty-two thousand, five hundred twenty-one".