21100111000200 has 96 divisors (see below), whose sum is σ = 72678160130400. Its totient is φ = 5626696265280.

The previous prime is 21100111000139. The next prime is 21100111000211. The reversal of 21100111000200 is 200011100112.

It is a happy number.

It is a super-2 number, since 2×21100111000200² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1953708582 + ... + 1953719381.

It is an arithmetic number, because the mean of its divisors is an integer number (757064168025).

Almost surely, 2^{21100111000200} is an apocalyptic number.

21100111000200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100111000200 is an abundant number, since it is smaller than the sum of its proper divisors (51578049130200).

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

21100111000200 is a wasteful number, since it uses less digits than its factorization.

21100111000200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907427988 (or 3907427973 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21100111000200 its reverse (200011100112), we get a palindrome (21300122100312).

The spelling of 21100111000200 in words is "twenty-one trillion, one hundred billion, one hundred eleven million, two hundred", and thus it is an aban number.