123030445425521 has 4 divisors (see below), whose sum is σ = 123076924629312. Its totient is φ = 122983966221732.

The previous prime is 123030445425443. The next prime is 123030445425523. The reversal of 123030445425521 is 125524544030321.

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 123030445425521 - 2¹⁸ = 123030445163377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123030445425523) 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, 23239597925 + ... + 23239603218.

It is an arithmetic number, because the mean of its divisors is an integer number (30769231157328).

Almost surely, 2^{123030445425521} is an apocalyptic number.

It is an amenable number.

123030445425521 is a deficient number, since it is larger than the sum of its proper divisors (46479203791).

123030445425521 is an equidigital number, since it uses as much as digits as its factorization.

123030445425521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46479203790.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 123030445425521 its reverse (125524544030321), we get a palindrome (248554989455842).

The spelling of 123030445425521 in words is "one hundred twenty-three trillion, thirty billion, four hundred forty-five million, four hundred twenty-five thousand, five hundred twenty-one".