123530515334021 has 4 divisors (see below), whose sum is σ = 123559506306444. Its totient is φ = 123501524361600.

The previous prime is 123530515334003. The next prime is 123530515334053. The reversal of 123530515334021 is 120433515035321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106690079569921 + 16840435764100 = 10329089^2 + 4103710^2 .

It is a cyclic number.

It is not a de Polignac number, because 123530515334021 - 2³⁰ = 123529441592197 is a prime.

It is a super-3 number, since 3×123530515334021³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123530515334071) 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, 14495479820 + ... + 14495488341.

It is an arithmetic number, because the mean of its divisors is an integer number (30889876576611).

Almost surely, 2^{123530515334021} is an apocalyptic number.

It is an amenable number.

123530515334021 is a deficient number, since it is larger than the sum of its proper divisors (28990972423).

123530515334021 is an equidigital number, since it uses as much as digits as its factorization.

123530515334021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28990972422.

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 123530515334021 in words is "one hundred twenty-three trillion, five hundred thirty billion, five hundred fifteen million, three hundred thirty-four thousand, twenty-one".