21210000100200 has 288 divisors, whose sum is σ = 76890229603200. Its totient is φ = 5223531962880.

The previous prime is 21210000100199. The next prime is 21210000100213. The reversal of 21210000100200 is 200100001212.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7632484 + ... + 10033683.

It is an arithmetic number, because the mean of its divisors is an integer number (266979963900).

Almost surely, 2^{21210000100200} is an apocalyptic number.

21210000100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210000100200 is an abundant number, since it is smaller than the sum of its proper divisors (55680229503000).

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

21210000100200 is a wasteful number, since it uses less digits than its factorization.

21210000100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17666241 (or 17666229 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21210000100200 its reverse (200100001212), we get a palindrome (21410100101412).

The spelling of 21210000100200 in words is "twenty-one trillion, two hundred ten billion, one hundred thousand, two hundred".