3221221211 has 16 divisors (see below), whose sum is σ = 3559775520. Its totient is φ = 2895886080.

The previous prime is 3221221193. The next prime is 3221221219. The reversal of 3221221211 is 1121221223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3221221211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3221221211.

It is not an unprimeable number, because it can be changed into a prime (3221221219) 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, 321800 + ... + 331658.

It is an arithmetic number, because the mean of its divisors is an integer number (222485970).

Almost surely, 2^3221221211 is an apocalyptic number.

3221221211 is a deficient number, since it is larger than the sum of its proper divisors (338554309).

3221221211 is a wasteful number, since it uses less digits than its factorization.

3221221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10526.

The product of its digits is 96, while the sum is 17.

The square root of 3221221211 is about 56755.8033244178. The cubic root of 3221221211 is about 1476.8629088018.

Adding to 3221221211 its reverse (1121221223), we get a palindrome (4342442434).

The spelling of 3221221211 in words is "three billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred eleven".