113200021 has 16 divisors (see below), whose sum is σ = 128381760. Its totient is φ = 98869120.

The previous prime is 113200013. The next prime is 113200027. The reversal of 113200021 is 120002311.

It is not a de Polignac number, because 113200021 - 2³ = 113200013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113199980 and 113200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113200027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73566 + ... + 75088.

It is an arithmetic number, because the mean of its divisors is an integer number (8023860).

Almost surely, 2^113200021 is an apocalyptic number.

113200021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113200021 is a deficient number, since it is larger than the sum of its proper divisors (15181739).

113200021 is a wasteful number, since it uses less digits than its factorization.

113200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 113200021 is about 10639.5498495002. The cubic root of 113200021 is about 483.7439009529.

Adding to 113200021 its reverse (120002311), we get a palindrome (233202332).

The spelling of 113200021 in words is "one hundred thirteen million, two hundred thousand, twenty-one".