111110120020 has 48 divisors (see below), whose sum is σ = 242300556288. Its totient is φ = 42752782080.

The previous prime is 111110120003. The next prime is 111110120039. The reversal of 111110120020 is 20021011111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 111110119979 and 111110120006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433017 + ... + 640096.

It is an arithmetic number, because the mean of its divisors is an integer number (5047928256).

Almost surely, 2^111110120020 is an apocalyptic number.

111110120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111110120020 is an abundant number, since it is smaller than the sum of its proper divisors (131190436268).

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

111110120020 is a wasteful number, since it uses less digits than its factorization.

111110120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073320 (or 1073318 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111110120020 its reverse (20021011111), we get a palindrome (131131131131).

The spelling of 111110120020 in words is "one hundred eleven billion, one hundred ten million, one hundred twenty thousand, twenty".