111211012120 has 32 divisors (see below), whose sum is σ = 269472838320. Its totient is φ = 41062527360.

The previous prime is 111211012117. The next prime is 111211012163. The reversal of 111211012120 is 21210112111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 111211012120.

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, 106933146 + ... + 106934185.

Almost surely, 2^111211012120 is an apocalyptic number.

111211012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211012120 is an abundant number, since it is smaller than the sum of its proper divisors (158261826200).

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

111211012120 is a wasteful number, since it uses less digits than its factorization.

111211012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213867355 (or 213867351 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111211012120 its reverse (21210112111), we get a palindrome (132421124231).

Subtracting from 111211012120 its reverse (21210112111), we obtain a palindrome (90000900009).

The spelling of 111211012120 in words is "one hundred eleven billion, two hundred eleven million, twelve thousand, one hundred twenty".