200021112010021 has 4 divisors (see below), whose sum is σ = 200703777921612. Its totient is φ = 199338446098432.

The previous prime is 200021112010019. The next prime is 200021112010207. The reversal of 200021112010021 is 120010211120002.

200021112010021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 185730179297796 + 14290932712225 = 13628286^2 + 3780335^2 .

It is a cyclic number.

It is not a de Polignac number, because 200021112010021 - 2¹ = 200021112010019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200021112009983 and 200021112010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021112010721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341332955356 + ... + 341332955941.

It is an arithmetic number, because the mean of its divisors is an integer number (50175944480403).

Almost surely, 2^{200021112010021} is an apocalyptic number.

It is an amenable number.

200021112010021 is a deficient number, since it is larger than the sum of its proper divisors (682665911591).

200021112010021 is an equidigital number, since it uses as much as digits as its factorization.

200021112010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682665911590.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200021112010021 its reverse (120010211120002), we get a palindrome (320031323130023).

The spelling of 200021112010021 in words is "two hundred trillion, twenty-one billion, one hundred twelve million, ten thousand, twenty-one".