10211210221 has 2 divisors, whose sum is σ = 10211210222. Its totient is φ = 10211210220.

The previous prime is 10211210209. The next prime is 10211210227. The reversal of 10211210221 is 12201211201.

10211210221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9749390121 + 461820100 = 98739^2 + 21490^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211210221 - 2²¹ = 10209113069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211210227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105605110 + 5105605111.

It is an arithmetic number, because the mean of its divisors is an integer number (5105605111).

Almost surely, 2^10211210221 is an apocalyptic number.

It is an amenable number.

10211210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211210221 is an equidigital number, since it uses as much as digits as its factorization.

10211210221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10211210221 its reverse (12201211201), we get a palindrome (22412421422).

The spelling of 10211210221 in words is "ten billion, two hundred eleven million, two hundred ten thousand, two hundred twenty-one".