2021200200221 has 4 divisors (see below), whose sum is σ = 2035953486492. Its totient is φ = 2006446913952.

The previous prime is 2021200200199. The next prime is 2021200200223. The reversal of 2021200200221 is 1220020021202.

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 510673168996 + 1510527031225 = 714614^2 + 1229035^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021200200221 - 2¹⁸ = 2021199938077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021200200196 and 2021200200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021200200223) 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, 7376642930 + ... + 7376643203.

It is an arithmetic number, because the mean of its divisors is an integer number (508988371623).

Almost surely, 2^{2021200200221} is an apocalyptic number.

It is an amenable number.

2021200200221 is a deficient number, since it is larger than the sum of its proper divisors (14753286271).

2021200200221 is a wasteful number, since it uses less digits than its factorization.

2021200200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14753286270.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2021200200221 its reverse (1220020021202), we get a palindrome (3241220221423).

The spelling of 2021200200221 in words is "two trillion, twenty-one billion, two hundred million, two hundred thousand, two hundred twenty-one".