200020211021 has 4 divisors (see below), whose sum is σ = 200817104544. Its totient is φ = 199223317500.

The previous prime is 200020210997. The next prime is 200020211077. The reversal of 200020211021 is 120112020002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200020211021 - 2¹⁰ = 200020209997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200020210993 and 200020211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200020211221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398446385 + ... + 398446886.

It is an arithmetic number, because the mean of its divisors is an integer number (50204276136).

Almost surely, 2^200020211021 is an apocalyptic number.

It is an amenable number.

200020211021 is a deficient number, since it is larger than the sum of its proper divisors (796893523).

200020211021 is an equidigital number, since it uses as much as digits as its factorization.

200020211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796893522.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 200020211021 its reverse (120112020002), we get a palindrome (320132231023).

The spelling of 200020211021 in words is "two hundred billion, twenty million, two hundred eleven thousand, twenty-one".