11112021012120 has 128 divisors (see below), whose sum is σ = 38099946931200. Its totient is φ = 2539784572416.

The previous prime is 11112021012109. The next prime is 11112021012133. The reversal of 11112021012120 is 2121012021111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11112021012120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20834941 + ... + 21361619.

It is an arithmetic number, because the mean of its divisors is an integer number (297655835400).

Almost surely, 2^{11112021012120} is an apocalyptic number.

11112021012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112021012120 is an abundant number, since it is smaller than the sum of its proper divisors (26987925919080).

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

11112021012120 is a wasteful number, since it uses less digits than its factorization.

11112021012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551817 (or 551813 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11112021012120 its reverse (2121012021111), we get a palindrome (13233033033231).

The spelling of 11112021012120 in words is "eleven trillion, one hundred twelve billion, twenty-one million, twelve thousand, one hundred twenty".