3213230221 has 2 divisors, whose sum is σ = 3213230222. Its totient is φ = 3213230220.

The previous prime is 3213230219. The next prime is 3213230227. The reversal of 3213230221 is 1220323123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3092472100 + 120758121 = 55610^2 + 10989^2 .

It is a cyclic number.

It is not a de Polignac number, because 3213230221 - 2¹ = 3213230219 is a prime.

Together with 3213230219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3213230227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606615110 + 1606615111.

It is an arithmetic number, because the mean of its divisors is an integer number (1606615111).

Almost surely, 2^3213230221 is an apocalyptic number.

It is an amenable number.

3213230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3213230221 is an equidigital number, since it uses as much as digits as its factorization.

3213230221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3213230221 is about 56685.3616112661. The cubic root of 3213230221 is about 1475.6406633340.

Adding to 3213230221 its reverse (1220323123), we get a palindrome (4433553344).

The spelling of 3213230221 in words is "three billion, two hundred thirteen million, two hundred thirty thousand, two hundred twenty-one".