3121320323 has 16 divisors (see below), whose sum is σ = 3593990400. Its totient is φ = 2680944480.

The previous prime is 3121320287. The next prime is 3121320329. The reversal of 3121320323 is 3230231213.

It is a cyclic number.

It is not a de Polignac number, because 3121320323 - 2¹⁸ = 3121058179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3121320295 and 3121320304.

It is not an unprimeable number, because it can be changed into a prime (3121320329) 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, 57938 + ... + 97976.

It is an arithmetic number, because the mean of its divisors is an integer number (224624400).

Almost surely, 2^3121320323 is an apocalyptic number.

3121320323 is a deficient number, since it is larger than the sum of its proper divisors (472670077).

3121320323 is a wasteful number, since it uses less digits than its factorization.

3121320323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40442.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 3121320323 is about 55868.7777117058. Note that the first 4 decimals coincide. The cubic root of 3121320323 is about 1461.4348068850.

Adding to 3121320323 its reverse (3230231213), we get a palindrome (6351551536).

The spelling of 3121320323 in words is "three billion, one hundred twenty-one million, three hundred twenty thousand, three hundred twenty-three".