3210020221 has 2 divisors, whose sum is σ = 3210020222. Its totient is φ = 3210020220.

The previous prime is 3210020213. The next prime is 3210020251. The reversal of 3210020221 is 1220200123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2958163321 + 251856900 = 54389^2 + 15870^2 .

It is a cyclic number.

It is not a de Polignac number, because 3210020221 - 2³ = 3210020213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3210020251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605010110 + 1605010111.

It is an arithmetic number, because the mean of its divisors is an integer number (1605010111).

Almost surely, 2^3210020221 is an apocalyptic number.

It is an amenable number.

3210020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3210020221 is an equidigital number, since it uses as much as digits as its factorization.

3210020221 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 3210020221 is about 56657.0403480450. The cubic root of 3210020221 is about 1475.1491138726.

Adding to 3210020221 its reverse (1220200123), we get a palindrome (4430220344).

The spelling of 3210020221 in words is "three billion, two hundred ten million, twenty thousand, two hundred twenty-one".