21100330200 has 96 divisors (see below), whose sum is σ = 67006492560. Its totient is φ = 5489510400.

The previous prime is 21100330177. The next prime is 21100330201. The reversal of 21100330200 is 203300112.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100330201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404269 + ... + 453468.

Almost surely, 2^21100330200 is an apocalyptic number.

21100330200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100330200 is an abundant number, since it is smaller than the sum of its proper divisors (45906162360).

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

21100330200 is a wasteful number, since it uses less digits than its factorization.

21100330200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857797 (or 857788 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21100330200 its reverse (203300112), we get a palindrome (21303630312).

The spelling of 21100330200 in words is "twenty-one billion, one hundred million, three hundred thirty thousand, two hundred".