111111120 has 60 divisors (see below), whose sum is σ = 373150596. Its totient is φ = 29629440.

The previous prime is 111111113. The next prime is 111111131. The reversal of 111111120 is 21111111.

It can be written as a sum of positive squares in 2 ways, for example, as 21013056 + 90098064 = 4584^2 + 9492^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76441 + ... + 77880.

Almost surely, 2^111111120 is an apocalyptic number.

111111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111120 is an abundant number, since it is smaller than the sum of its proper divisors (262039476).

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

111111120 is a wasteful number, since it uses less digits than its factorization.

111111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154340 (or 154331 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

The square root of 111111120 is about 10540.9259555316. The cubic root of 111111120 is about 480.7498695891.

Adding to 111111120 its reverse (21111111), we get a palindrome (132222231).

Subtracting from 111111120 its reverse (21111111), we obtain a palindrome (90000009).

The spelling of 111111120 in words is "one hundred eleven million, one hundred eleven thousand, one hundred twenty".