111200100020 has 24 divisors (see below), whose sum is σ = 233979013800. Its totient is φ = 44392648832.

The previous prime is 111200100019. The next prime is 111200100023. The reversal of 111200100020 is 20001002111.

111200100020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7353748516 + 103846351504 = 85754^2 + 322252^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111200099980 and 111200100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111200100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5451515 + ... + 5471874.

It is an arithmetic number, because the mean of its divisors is an integer number (9749125575).

Almost surely, 2^111200100020 is an apocalyptic number.

111200100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111200100020 is an abundant number, since it is smaller than the sum of its proper divisors (122778913780).

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

111200100020 is a wasteful number, since it uses less digits than its factorization.

111200100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10923907 (or 10923905 counting only the distinct ones).

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

Adding to 111200100020 its reverse (20001002111), we get a palindrome (131201102131).

The spelling of 111200100020 in words is "one hundred eleven billion, two hundred million, one hundred thousand, twenty".