111200200000020 has 72 divisors (see below), whose sum is σ = 337312539007080. Its totient is φ = 29652923750400.

The previous prime is 111200200000003. The next prime is 111200200000051. The reversal of 111200200000020 is 20000002002111.

It can be written as a sum of positive squares in 4 ways, for example, as 53492050758276 + 57708149241744 = 7313826^2 + 7596588^2 .

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 = 111200199999948 and 111200200000011.

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, 6818220 + ... + 16397820.

Almost surely, 2^{111200200000020} is an apocalyptic number.

111200200000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111200200000020 is an abundant number, since it is smaller than the sum of its proper divisors (226112339007060).

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

111200200000020 is a wasteful number, since it uses less digits than its factorization.

111200200000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9644105 (or 9644100 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 111200200000020 its reverse (20000002002111), we get a palindrome (131200202002131).

The spelling of 111200200000020 in words is "one hundred eleven trillion, two hundred billion, two hundred million, twenty", and thus it is an aban number.