20202000221 has 16 divisors (see below), whose sum is σ = 21828220848. Its totient is φ = 18586214400.

The previous prime is 20202000157. The next prime is 20202000223. The reversal of 20202000221 is 12200020202.

It can be written as a sum of positive squares in 8 ways, for example, as 6778228900 + 13423771321 = 82330^2 + 115861^2 .

It is not a de Polignac number, because 20202000221 - 2⁶ = 20202000157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202000223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5639651 + ... + 5643231.

It is an arithmetic number, because the mean of its divisors is an integer number (1364263803).

Almost surely, 2^20202000221 is an apocalyptic number.

It is an amenable number.

20202000221 is a deficient number, since it is larger than the sum of its proper divisors (1626220627).

20202000221 is a wasteful number, since it uses less digits than its factorization.

20202000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20202000221 its reverse (12200020202), we get a palindrome (32402020423).

The spelling of 20202000221 in words is "twenty billion, two hundred two million, two hundred twenty-one", and thus it is an aban number.