3220013221 has 2 divisors, whose sum is σ = 3220013222. Its totient is φ = 3220013220.

The previous prime is 3220013191. The next prime is 3220013227. The reversal of 3220013221 is 1223100223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2414248225 + 805764996 = 49135^2 + 28386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220013221 - 2²¹ = 3217916069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3220013195 and 3220013204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3220013227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610006610 + 1610006611.

It is an arithmetic number, because the mean of its divisors is an integer number (1610006611).

Almost surely, 2^3220013221 is an apocalyptic number.

It is an amenable number.

3220013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3220013221 is an equidigital number, since it uses as much as digits as its factorization.

3220013221 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 3220013221 is about 56745.1603310802. The cubic root of 3220013221 is about 1476.6782729587.

Adding to 3220013221 its reverse (1223100223), we get a palindrome (4443113444).

The spelling of 3220013221 in words is "three billion, two hundred twenty million, thirteen thousand, two hundred twenty-one".