111200102020 has 48 divisors (see below), whose sum is σ = 270639145728. Its totient is φ = 37588763520.

The previous prime is 111200102011. The next prime is 111200102021. The reversal of 111200102020 is 20201002111.

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 = 111200101988 and 111200102006.

It is not an unprimeable number, because it can be changed into a prime (111200102021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5583627 + ... + 5603506.

It is an arithmetic number, because the mean of its divisors is an integer number (5638315536).

Almost surely, 2^111200102020 is an apocalyptic number.

111200102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111200102020 is an abundant number, since it is smaller than the sum of its proper divisors (159439043708).

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

111200102020 is a wasteful number, since it uses less digits than its factorization.

111200102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11187220 (or 11187218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 111200102020 its reverse (20201002111), we get a palindrome (131401104131).

Subtracting from 111200102020 its reverse (20201002111), we obtain a palindrome (90999099909).

The spelling of 111200102020 in words is "one hundred eleven billion, two hundred million, one hundred two thousand, twenty".