200021000010021 has 48 divisors (see below), whose sum is σ = 318084654551040. Its totient is φ = 120556121035680.

The previous prime is 200021000010001. The next prime is 200021000010031. The reversal of 200021000010021 is 120010000120002.

200021000010021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 200021000010021 - 2⁷ = 200021000009893 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 = 200021000009985 and 200021000010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021000010001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57303841 + ... + 60694086.

It is an arithmetic number, because the mean of its divisors is an integer number (6626763636480).

Almost surely, 2^{200021000010021} is an apocalyptic number.

It is an amenable number.

200021000010021 is a deficient number, since it is larger than the sum of its proper divisors (118063654541019).

200021000010021 is a wasteful number, since it uses less digits than its factorization.

200021000010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117998406 (or 117998403 counting only the distinct ones).

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

Adding to 200021000010021 its reverse (120010000120002), we get a palindrome (320031000130023).

The spelling of 200021000010021 in words is "two hundred trillion, twenty-one billion, ten thousand, twenty-one".