111001100020 has 12 divisors (see below), whose sum is σ = 233102310084. Its totient is φ = 44400440000.

The previous prime is 111001100003. The next prime is 111001100053. The reversal of 111001100020 is 20001100111.

It can be written as a sum of positive squares in 2 ways, for example, as 23939516176 + 87061583844 = 154724^2 + 295062^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111001099976 and 111001100012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2775027481 + ... + 2775027520.

It is an arithmetic number, because the mean of its divisors is an integer number (19425192507).

Almost surely, 2^111001100020 is an apocalyptic number.

111001100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001100020 is an abundant number, since it is smaller than the sum of its proper divisors (122101210064).

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

111001100020 is a wasteful number, since it uses less digits than its factorization.

111001100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550055010 (or 5550055008 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 111001100020 its reverse (20001100111), we get a palindrome (131002200131).

Subtracting from 111001100020 its reverse (20001100111), we obtain a palindrome (90999999909).

The spelling of 111001100020 in words is "one hundred eleven billion, one million, one hundred thousand, twenty".