111100020 has 24 divisors (see below), whose sum is σ = 311080224. Its totient is φ = 29626656.

The previous prime is 111099997. The next prime is 111100027. The reversal of 111100020 is 20001111.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 111099981 and 111100008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925774 + ... + 925893.

It is an arithmetic number, because the mean of its divisors is an integer number (12961676).

Almost surely, 2^111100020 is an apocalyptic number.

111100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111100020 is an abundant number, since it is smaller than the sum of its proper divisors (199980204).

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

111100020 is a wasteful number, since it uses less digits than its factorization.

111100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851679 (or 1851677 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 111100020 is about 10540.3994231718. The cubic root of 111100020 is about 480.7338600866.

Adding to 111100020 its reverse (20001111), we get a palindrome (131101131).

The spelling of 111100020 in words is "one hundred eleven million, one hundred thousand, twenty".