3123320221 has 24 divisors (see below), whose sum is σ = 3687690240. Its totient is φ = 2637180000.

The previous prime is 3123320203. The next prime is 3123320243. The reversal of 3123320221 is 1220233213.

3123320221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3123320221 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 (3123320251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2712996 + ... + 2714146.

It is an arithmetic number, because the mean of its divisors is an integer number (153653760).

Almost surely, 2^3123320221 is an apocalyptic number.

It is an amenable number.

3123320221 is a deficient number, since it is larger than the sum of its proper divisors (564370019).

3123320221 is a wasteful number, since it uses less digits than its factorization.

3123320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3123320221 is about 55886.6730178135. The cubic root of 3123320221 is about 1461.7468646309.

Adding to 3123320221 its reverse (1220233213), we get a palindrome (4343553434).

The spelling of 3123320221 in words is "three billion, one hundred twenty-three million, three hundred twenty thousand, two hundred twenty-one".