3220021361 has 2 divisors, whose sum is σ = 3220021362. Its totient is φ = 3220021360.

The previous prime is 3220021349. The next prime is 3220021369. The reversal of 3220021361 is 1631200223.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3042625600 + 177395761 = 55160^2 + 13319^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220021361 - 2⁶ = 3220021297 is a prime.

It is not a weakly prime, because it can be changed into another prime (3220021369) 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, 1610010680 + 1610010681.

It is an arithmetic number, because the mean of its divisors is an integer number (1610010681).

Almost surely, 2^3220021361 is an apocalyptic number.

It is an amenable number.

3220021361 is a deficient number, since it is larger than the sum of its proper divisors (1).

3220021361 is an equidigital number, since it uses as much as digits as its factorization.

3220021361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3220021361 is about 56745.2320552132. The cubic root of 3220021361 is about 1476.6795172757.

Adding to 3220021361 its reverse (1631200223), we get a palindrome (4851221584).

The spelling of 3220021361 in words is "three billion, two hundred twenty million, twenty-one thousand, three hundred sixty-one".