111110020020 has 72 divisors (see below), whose sum is σ = 341094420576. Its totient is φ = 29272354752.

The previous prime is 111110020019. The next prime is 111110020031. The reversal of 111110020020 is 20020011111.

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 = 111110019984 and 111110020011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3703602 + ... + 3733481.

It is an arithmetic number, because the mean of its divisors is an integer number (4737422508).

Almost surely, 2^111110020020 is an apocalyptic number.

111110020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111110020020 is an abundant number, since it is smaller than the sum of its proper divisors (229984400556).

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

111110020020 is a wasteful number, since it uses less digits than its factorization.

111110020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7437181 (or 7437176 counting only the distinct ones).

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

Adding to 111110020020 its reverse (20020011111), we get a palindrome (131130031131).

The spelling of 111110020020 in words is "one hundred eleven billion, one hundred ten million, twenty thousand, twenty".