3121312330 has 8 divisors (see below), whose sum is σ = 5618362212. Its totient is φ = 1248524928.

The previous prime is 3121312307. The next prime is 3121312333. The reversal of 3121312330 is 332131213.

It can be written as a sum of positive squares in 2 ways, for example, as 2615197321 + 506115009 = 51139^2 + 22497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3121312330² = 19485181322820057800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3121312298 and 3121312307.

It is not an unprimeable number, because it can be changed into a prime (3121312333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156065607 + ... + 156065626.

Almost surely, 2^3121312330 is an apocalyptic number.

3121312330 is a deficient number, since it is larger than the sum of its proper divisors (2497049882).

3121312330 is a wasteful number, since it uses less digits than its factorization.

3121312330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312131240.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 3121312330 is about 55868.7061779669. The cubic root of 3121312330 is about 1461.4335594152.

Adding to 3121312330 its reverse (332131213), we get a palindrome (3453443543).

The spelling of 3121312330 in words is "three billion, one hundred twenty-one million, three hundred twelve thousand, three hundred thirty".