210220020221 has 2 divisors, whose sum is σ = 210220020222. Its totient is φ = 210220020220.

The previous prime is 210220020187. The next prime is 210220020223. The reversal of 210220020221 is 122020022012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182381097721 + 27838922500 = 427061^2 + 166850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210220020221 is a prime.

Together with 210220020223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 210220020196 and 210220020205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210220020223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110010110 + 105110010111.

It is an arithmetic number, because the mean of its divisors is an integer number (105110010111).

Almost surely, 2^210220020221 is an apocalyptic number.

It is an amenable number.

210220020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220020221 is an equidigital number, since it uses as much as digits as its factorization.

210220020221 is an evil number, because the sum of its binary digits is even.

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

Adding to 210220020221 its reverse (122020022012), we get a palindrome (332240042233).

The spelling of 210220020221 in words is "two hundred ten billion, two hundred twenty million, twenty thousand, two hundred twenty-one".