120210221 has 2 divisors, whose sum is σ = 120210222. Its totient is φ = 120210220.

The previous prime is 120210203. The next prime is 120210289. The reversal of 120210221 is 122012021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115326121 + 4884100 = 10739^2 + 2210^2 .

It is an emirp because it is prime and its reverse (122012021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120210221 - 2¹⁰ = 120209197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120210421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60105110 + 60105111.

It is an arithmetic number, because the mean of its divisors is an integer number (60105111).

Almost surely, 2^120210221 is an apocalyptic number.

It is an amenable number.

120210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120210221 is an equidigital number, since it uses as much as digits as its factorization.

120210221 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 11.

The square root of 120210221 is about 10964.0421834285. The cubic root of 120210221 is about 493.5302743748.

Adding to 120210221 its reverse (122012021), we get a palindrome (242222242).

The spelling of 120210221 in words is "one hundred twenty million, two hundred ten thousand, two hundred twenty-one".