20201022200221 has 2 divisors, whose sum is σ = 20201022200222. Its totient is φ = 20201022200220.

The previous prime is 20201022200213. The next prime is 20201022200273. The reversal of 20201022200221 is 12200222010202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14330388802500 + 5870633397721 = 3785550^2 + 2422939^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201022200221 - 2³ = 20201022200213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201022200195 and 20201022200204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201022200291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100511100110 + 10100511100111.

It is an arithmetic number, because the mean of its divisors is an integer number (10100511100111).

Almost surely, 2^{20201022200221} is an apocalyptic number.

It is an amenable number.

20201022200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201022200221 is an equidigital number, since it uses as much as digits as its factorization.

20201022200221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20201022200221 its reverse (12200222010202), we get a palindrome (32401244210423).

The spelling of 20201022200221 in words is "twenty trillion, two hundred one billion, twenty-two million, two hundred thousand, two hundred twenty-one".