3223212221 has 8 divisors (see below), whose sum is σ = 3335002200. Its totient is φ = 3111465280.

The previous prime is 3223212211. The next prime is 3223212227. The reversal of 3223212221 is 1222123223.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 34351321 + 3188860900 = 5861^2 + 56470^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3223212221 - 2¹⁸ = 3222950077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3223212193 and 3223212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3223212227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244991 + ... + 257811.

It is an arithmetic number, because the mean of its divisors is an integer number (416875275).

Almost surely, 2^3223212221 is an apocalyptic number.

It is an amenable number.

3223212221 is a deficient number, since it is larger than the sum of its proper divisors (111789979).

3223212221 is a wasteful number, since it uses less digits than its factorization.

3223212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21519.

The product of its digits is 576, while the sum is 20.

The square root of 3223212221 is about 56773.3407595502. The cubic root of 3223212221 is about 1477.1671250201.

Adding to 3223212221 its reverse (1222123223), we get a palindrome (4445335444).

The spelling of 3223212221 in words is "three billion, two hundred twenty-three million, two hundred twelve thousand, two hundred twenty-one".