3123221221 has 8 divisors (see below), whose sum is σ = 3275395200. Its totient is φ = 2972412432.

The previous prime is 3123221219. The next prime is 3123221237. The reversal of 3123221221 is 1221223213.

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 3123221221 - 2¹ = 3123221219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123221251) 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, 336610 + ... + 345763.

It is an arithmetic number, because the mean of its divisors is an integer number (409424400).

Almost surely, 2^3123221221 is an apocalyptic number.

It is an amenable number.

3123221221 is a deficient number, since it is larger than the sum of its proper divisors (152173979).

3123221221 is a wasteful number, since it uses less digits than its factorization.

3123221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682595.

The product of its digits is 288, while the sum is 19.

The square root of 3123221221 is about 55885.7872897931. The cubic root of 3123221221 is about 1461.7314201190.

Adding to 3123221221 its reverse (1221223213), we get a palindrome (4344444434).

The spelling of 3123221221 in words is "three billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred twenty-one".