123012320012120 has 128 divisors (see below), whose sum is σ = 351584342691840. Its totient is φ = 37618077719040.

The previous prime is 123012320012093. The next prime is 123012320012159. The reversal of 123012320012120 is 21210023210321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123012320012092 and 123012320012101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 376620392 + ... + 376946871.

It is an arithmetic number, because the mean of its divisors is an integer number (2746752677280).

Almost surely, 2^{123012320012120} is an apocalyptic number.

123012320012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123012320012120 is an abundant number, since it is smaller than the sum of its proper divisors (228572022679720).

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

123012320012120 is a wasteful number, since it uses less digits than its factorization.

123012320012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753567345 (or 753567341 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123012320012120 its reverse (21210023210321), we get a palindrome (144222343222441).

The spelling of 123012320012120 in words is "one hundred twenty-three trillion, twelve billion, three hundred twenty million, twelve thousand, one hundred twenty".