111100002020 has 72 divisors (see below), whose sum is σ = 274088820600. Its totient is φ = 37714252800.

The previous prime is 111100002007. The next prime is 111100002059. The reversal of 111100002020 is 20200001111.

It can be written as a sum of positive squares in 4 ways, for example, as 51813595876 + 59286406144 = 227626^2 + 243488^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111100001989 and 111100002007.

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, 462245 + ... + 660204.

It is an arithmetic number, because the mean of its divisors is an integer number (3806789175).

Almost surely, 2^111100002020 is an apocalyptic number.

111100002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111100002020 is an abundant number, since it is smaller than the sum of its proper divisors (162988818580).

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

111100002020 is a wasteful number, since it uses less digits than its factorization.

111100002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122573 (or 1122564 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 111100002020 its reverse (20200001111), we get a palindrome (131300003131).

Subtracting from 111100002020 its reverse (20200001111), we obtain a palindrome (90900000909).

The spelling of 111100002020 in words is "one hundred eleven billion, one hundred million, two thousand, twenty".