21200112200100 has 144 divisors (see below), whose sum is σ = 66070611210240. Its totient is φ = 5233127222400.

The previous prime is 21200112200087. The next prime is 21200112200119. The reversal of 21200112200100 is 100221100212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49342230 + ... + 49770029.

It is an arithmetic number, because the mean of its divisors is an integer number (458823688960).

Almost surely, 2^{21200112200100} is an apocalyptic number.

21200112200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200112200100 is an abundant number, since it is smaller than the sum of its proper divisors (44870499010140).

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

21200112200100 is a wasteful number, since it uses less digits than its factorization.

21200112200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99112330 (or 99112323 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21200112200100 its reverse (100221100212), we get a palindrome (21300333300312).

The spelling of 21200112200100 in words is "twenty-one trillion, two hundred billion, one hundred twelve million, two hundred thousand, one hundred".