123111022121120 has 96 divisors (see below), whose sum is σ = 317296614882240. Its totient is φ = 44766806999040.

The previous prime is 123111022121107. The next prime is 123111022121207. The reversal of 123111022121120 is 21121220111321.

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 = 123111022121092 and 123111022121101.

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 15 ways as a sum of consecutive naturals, for example, 97657376 + ... + 98909984.

It is an arithmetic number, because the mean of its divisors is an integer number (3305173071690).

Almost surely, 2^{123111022121120} is an apocalyptic number.

123111022121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123111022121120 is an abundant number, since it is smaller than the sum of its proper divisors (194185592761120).

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

123111022121120 is a wasteful number, since it uses less digits than its factorization.

123111022121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308478 (or 1308470 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 123111022121120 its reverse (21121220111321), we get a palindrome (144232242232441).

The spelling of 123111022121120 in words is "one hundred twenty-three trillion, one hundred eleven billion, twenty-two million, one hundred twenty-one thousand, one hundred twenty".