21200113100 has 36 divisors (see below), whose sum is σ = 46308942288. Its totient is φ = 8423880000.

The previous prime is 21200113091. The next prime is 21200113111. The reversal of 21200113100 is 131100212.

It is a super-2 number, since 2×21200113100² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 686891 + ... + 717090.

It is an arithmetic number, because the mean of its divisors is an integer number (1286359508).

Almost surely, 2^21200113100 is an apocalyptic number.

21200113100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200113100 is an abundant number, since it is smaller than the sum of its proper divisors (25108829188).

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

21200113100 is a wasteful number, since it uses less digits than its factorization.

21200113100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404146 (or 1404139 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21200113100 its reverse (131100212), we get a palindrome (21331213312).

The spelling of 21200113100 in words is "twenty-one billion, two hundred million, one hundred thirteen thousand, one hundred".