20000020200221 has 2 divisors, whose sum is σ = 20000020200222. Its totient is φ = 20000020200220.

The previous prime is 20000020200179. The next prime is 20000020200229. The reversal of 20000020200221 is 12200202000002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13723216524196 + 6276803676025 = 3704486^2 + 2505355^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000020200221 - 2¹⁸ = 20000019938077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000020200229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000010100110 + 10000010100111.

It is an arithmetic number, because the mean of its divisors is an integer number (10000010100111).

Almost surely, 2^{20000020200221} is an apocalyptic number.

It is an amenable number.

20000020200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000020200221 is an equidigital number, since it uses as much as digits as its factorization.

20000020200221 is an evil number, because the sum of its binary digits is even.

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

Adding to 20000020200221 its reverse (12200202000002), we get a palindrome (32200222200223).

The spelling of 20000020200221 in words is "twenty trillion, twenty million, two hundred thousand, two hundred twenty-one".