21010111000200 has 288 divisors, whose sum is σ = 84882955684800. Its totient is φ = 4549557818880.

The previous prime is 21010111000169. The next prime is 21010111000201. The reversal of 21010111000200 is 200011101012.

It is a happy number.

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (21010111000201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 43641367 + ... + 44120166.

Almost surely, 2^{21010111000200} is an apocalyptic number.

21010111000200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010111000200 is an abundant number, since it is smaller than the sum of its proper divisors (63872844684600).

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

21010111000200 is a wasteful number, since it uses less digits than its factorization.

21010111000200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87761581 (or 87761569 counting only the distinct ones).

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

Adding to 21010111000200 its reverse (200011101012), we get a palindrome (21210122101212).

The spelling of 21010111000200 in words is "twenty-one trillion, ten billion, one hundred eleven million, two hundred", and thus it is an aban number.