123001023122120 has 128 divisors (see below), whose sum is σ = 325148376147840. Its totient is φ = 41285430743040.

The previous prime is 123001023122119. The next prime is 123001023122123. The reversal of 123001023122120 is 21221320100321.

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 = 123001023122092 and 123001023122101.

It is not an unprimeable number, because it can be changed into a prime (123001023122123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149470832 + ... + 150291488.

It is an arithmetic number, because the mean of its divisors is an integer number (2540221688655).

Almost surely, 2^{123001023122120} is an apocalyptic number.

123001023122120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123001023122120 is an abundant number, since it is smaller than the sum of its proper divisors (202147353025720).

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

123001023122120 is a wasteful number, since it uses less digits than its factorization.

123001023122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846895 (or 846891 counting only the distinct ones).

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

Adding to 123001023122120 its reverse (21221320100321), we get a palindrome (144222343222441).

The spelling of 123001023122120 in words is "one hundred twenty-three trillion, one billion, twenty-three million, one hundred twenty-two thousand, one hundred twenty".