210221233 has 2 divisors, whose sum is σ = 210221234. Its totient is φ = 210221232.

The previous prime is 210221191. The next prime is 210221251. The reversal of 210221233 is 332122012.

210221233 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., 117137329 + 93083904 = 10823^2 + 9648^2 .

It is a cyclic number.

It is not a de Polignac number, because 210221233 - 2⁹ = 210220721 is a prime.

It is not a weakly prime, because it can be changed into another prime (210221533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110616 + 105110617.

It is an arithmetic number, because the mean of its divisors is an integer number (105110617).

Almost surely, 2^210221233 is an apocalyptic number.

It is an amenable number.

210221233 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221233 is an equidigital number, since it uses as much as digits as its factorization.

210221233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 210221233 is about 14499.0080005496. The cubic root of 210221233 is about 594.6008508602.

Adding to 210221233 its reverse (332122012), we get a palindrome (542343245).

The spelling of 210221233 in words is "two hundred ten million, two hundred twenty-one thousand, two hundred thirty-three".