121112221120 has 56 divisors (see below), whose sum is σ = 314616529008. Its totient is φ = 44040806400.

The previous prime is 121112221081. The next prime is 121112221157. The reversal of 121112221120 is 21122211121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 121112221094 and 121112221103.

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, 17199921 + ... + 17206960.

Almost surely, 2^121112221120 is an apocalyptic number.

121112221120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112221120 is an abundant number, since it is smaller than the sum of its proper divisors (193504307888).

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

121112221120 is a wasteful number, since it uses less digits than its factorization.

121112221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34406909 (or 34406899 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121112221120 its reverse (21122211121), we get a palindrome (142234432241).

Subtracting from 121112221120 its reverse (21122211121), we obtain a palindrome (99990009999).

The spelling of 121112221120 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty".