123000340541521 has 4 divisors (see below), whose sum is σ = 123000397811200. Its totient is φ = 123000283271844.

The previous prime is 123000340541509. The next prime is 123000340541527. The reversal of 123000340541521 is 125145043000321.

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 123000340541521 - 2²¹ = 123000338444369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123000340541527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25282401 + ... + 29752318.

It is an arithmetic number, because the mean of its divisors is an integer number (30750099452800).

Almost surely, 2^{123000340541521} is an apocalyptic number.

It is an amenable number.

123000340541521 is a deficient number, since it is larger than the sum of its proper divisors (57269679).

123000340541521 is an equidigital number, since it uses as much as digits as its factorization.

123000340541521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57269678.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 123000340541521 its reverse (125145043000321), we get a palindrome (248145383541842).

The spelling of 123000340541521 in words is "one hundred twenty-three trillion, three hundred forty million, five hundred forty-one thousand, five hundred twenty-one".