21200100200010 has 48 divisors (see below), whose sum is σ = 55139690250216. Its totient is φ = 5651367260544.

The previous prime is 21200100199951. The next prime is 21200100200029. The reversal of 21200100200010 is 1000200100212.

It can be written as a sum of positive squares in 4 ways, for example, as 6511331096361 + 14688769103649 = 2551731^2 + 3832593^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21200100199965 and 21200100200001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41259769 + ... + 41770428.

Almost surely, 2^{21200100200010} is an apocalyptic number.

21200100200010 is an abundant number, since it is smaller than the sum of its proper divisors (33939590050206).

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

21200100200010 is a wasteful number, since it uses less digits than its factorization.

21200100200010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83033047 (or 83033044 counting only the distinct ones).

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

Adding to 21200100200010 its reverse (1000200100212), we get a palindrome (22200300300222).

The spelling of 21200100200010 in words is "twenty-one trillion, two hundred billion, one hundred million, two hundred thousand, ten".