210100000200021 has 96 divisors (see below), whose sum is σ = 326274636420096. Its totient is φ = 130032231552000.

The previous prime is 210100000200017. The next prime is 210100000200029. The reversal of 210100000200021 is 120002000001012.

It is not a de Polignac number, because 210100000200021 - 2² = 210100000200017 is a prime.

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 = 210100000199976 and 210100000200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100000200029) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2223774435 + ... + 2223868911.

It is an arithmetic number, because the mean of its divisors is an integer number (3398694129376).

Almost surely, 2^{210100000200021} is an apocalyptic number.

It is an amenable number.

210100000200021 is a deficient number, since it is larger than the sum of its proper divisors (116174636220075).

210100000200021 is a wasteful number, since it uses less digits than its factorization.

210100000200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97803 (or 97800 counting only the distinct ones).

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

Adding to 210100000200021 its reverse (120002000001012), we get a palindrome (330102000201033).

The spelling of 210100000200021 in words is "two hundred ten trillion, one hundred billion, two hundred thousand, twenty-one".