2003210221 has 2 divisors, whose sum is σ = 2003210222. Its totient is φ = 2003210220.

The previous prime is 2003210203. The next prime is 2003210227. The reversal of 2003210221 is 1220123002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1747658025 + 255552196 = 41805^2 + 15986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2003210221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003210227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001605110 + 1001605111.

It is an arithmetic number, because the mean of its divisors is an integer number (1001605111).

Almost surely, 2^2003210221 is an apocalyptic number.

It is an amenable number.

2003210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003210221 is an equidigital number, since it uses as much as digits as its factorization.

2003210221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2003210221 is about 44757.2365210365. The cubic root of 2003210221 is about 1260.5947937144.

Adding to 2003210221 its reverse (1220123002), we get a palindrome (3223333223).

The spelling of 2003210221 in words is "two billion, three million, two hundred ten thousand, two hundred twenty-one".