3121313321 has 8 divisors (see below), whose sum is σ = 3570245184. Its totient is φ = 2673138960.

The previous prime is 3121313263. The next prime is 3121313323. The reversal of 3121313321 is 1233131213.

3121313321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3121313321 - 2¹⁸ = 3121051177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121313293 and 3121313302.

It is not an unprimeable number, because it can be changed into a prime (3121313323) 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, 180515 + ... + 197048.

It is an arithmetic number, because the mean of its divisors is an integer number (446280648).

Almost surely, 2^3121313321 is an apocalyptic number.

It is an amenable number.

3121313321 is a deficient number, since it is larger than the sum of its proper divisors (448931863).

3121313321 is a wasteful number, since it uses less digits than its factorization.

3121313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378751.

The product of its digits is 324, while the sum is 20.

The square root of 3121313321 is about 55868.7150469742. The cubic root of 3121313321 is about 1461.4337140810.

Adding to 3121313321 its reverse (1233131213), we get a palindrome (4354444534).

The spelling of 3121313321 in words is "three billion, one hundred twenty-one million, three hundred thirteen thousand, three hundred twenty-one".