111112020 has 48 divisors (see below), whose sum is σ = 345683520. Its totient is φ = 29629728.

The previous prime is 111112007. The next prime is 111112037. The reversal of 111112020 is 20211111.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 111111993 and 111112011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102342 + ... + 103421.

It is an arithmetic number, because the mean of its divisors is an integer number (7201740).

Almost surely, 2^111112020 is an apocalyptic number.

111112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111112020 is an abundant number, since it is smaller than the sum of its proper divisors (234571500).

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

111112020 is a wasteful number, since it uses less digits than its factorization.

111112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205781 (or 205773 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 111112020 is about 10540.9686461919. The cubic root of 111112020 is about 480.7511676102.

Adding to 111112020 its reverse (20211111), we get a palindrome (131323131).

Subtracting from 111112020 its reverse (20211111), we obtain a palindrome (90900909).

It can be divided in two parts, 11111 and 2020, that added together give a palindrome (13131).

The spelling of 111112020 in words is "one hundred eleven million, one hundred twelve thousand, twenty".