3220221031221 has 16 divisors (see below), whose sum is σ = 4297341081600. Its totient is φ = 2144958057840.

The previous prime is 3220221031199. The next prime is 3220221031229. The reversal of 3220221031221 is 1221301220223.

3220221031221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3220221031221 - 2¹⁰ = 3220221030197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220221031229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24274330 + ... + 24406628.

It is an arithmetic number, because the mean of its divisors is an integer number (268583817600).

Almost surely, 2^{3220221031221} is an apocalyptic number.

It is an amenable number.

3220221031221 is a deficient number, since it is larger than the sum of its proper divisors (1077120050379).

3220221031221 is a wasteful number, since it uses less digits than its factorization.

3220221031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139256.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 3220221031221 its reverse (1221301220223), we get a palindrome (4441522251444).

The spelling of 3220221031221 in words is "three trillion, two hundred twenty billion, two hundred twenty-one million, thirty-one thousand, two hundred twenty-one".