123013240534520 has 32 divisors (see below), whose sum is σ = 316319761375200. Its totient is φ = 42175968183168.

The previous prime is 123013240534519. The next prime is 123013240534553. The reversal of 123013240534520 is 25435042310321.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219666500675 + ... + 219666501234.

It is an arithmetic number, because the mean of its divisors is an integer number (9884992542975).

Almost surely, 2^{123013240534520} is an apocalyptic number.

123013240534520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123013240534520 is an abundant number, since it is smaller than the sum of its proper divisors (193306520840680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123013240534520 is a wasteful number, since it uses less digits than its factorization.

123013240534520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439333001927 (or 439333001923 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 123013240534520 its reverse (25435042310321), we get a palindrome (148448282844841).

The spelling of 123013240534520 in words is "one hundred twenty-three trillion, thirteen billion, two hundred forty million, five hundred thirty-four thousand, five hundred twenty".