3123312321 has 16 divisors (see below), whose sum is σ = 4439091200. Its totient is φ = 1947645648.

The previous prime is 3123312319. The next prime is 3123312343. The reversal of 3123312321 is 1232133213.

It is not a de Polignac number, because 3123312321 - 2¹ = 3123312319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3123312821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342301 + ... + 351306.

It is an arithmetic number, because the mean of its divisors is an integer number (277443200).

Almost surely, 2^3123312321 is an apocalyptic number.

It is an amenable number.

3123312321 is a deficient number, since it is larger than the sum of its proper divisors (1315778879).

3123312321 is a wasteful number, since it uses less digits than its factorization.

3123312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693708.

The product of its digits is 648, while the sum is 21.

The square root of 3123312321 is about 55886.6023390222. The cubic root of 3123312321 is about 1461.7456322020.

Adding to 3123312321 its reverse (1232133213), we get a palindrome (4355445534).

The spelling of 3123312321 in words is "three billion, one hundred twenty-three million, three hundred twelve thousand, three hundred twenty-one".