2010221 has 2 divisors, whose sum is σ = 2010222. Its totient is φ = 2010220.

The previous prime is 2010191. The next prime is 2010227. The reversal of 2010221 is 1220102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 546121 = 1210^2 + 739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2010221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2010199 and 2010208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2010227) 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, 1005110 + 1005111.

It is an arithmetic number, because the mean of its divisors is an integer number (1005111).

2^2010221 is an apocalyptic number.

It is an amenable number.

2010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2010221 is an equidigital number, since it uses as much as digits as its factorization.

2010221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 2010221 is about 1417.8226264241. The cubic root of 2010221 is about 126.2063679568.

Adding to 2010221 its reverse (1220102), we get a palindrome (3230323).

The spelling of 2010221 in words is "two million, ten thousand, two hundred twenty-one".