3121232113 has 16 divisors (see below), whose sum is σ = 3343911120. Its totient is φ = 2903040000.

The previous prime is 3121232111. The next prime is 3121232123. The reversal of 3121232113 is 3112321213.

It can be written as a sum of positive squares in 8 ways, for example, as 475981489 + 2645250624 = 21817^2 + 51432^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121232113 - 2¹ = 3121232111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121232111) 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, 778113 + ... + 782113.

It is an arithmetic number, because the mean of its divisors is an integer number (208994445).

Almost surely, 2^3121232113 is an apocalyptic number.

It is an amenable number.

3121232113 is a deficient number, since it is larger than the sum of its proper divisors (222679007).

3121232113 is a wasteful number, since it uses less digits than its factorization.

3121232113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4548.

The product of its digits is 216, while the sum is 19.

The square root of 3121232113 is about 55867.9882669852. The cubic root of 3121232113 is about 1461.4210398072.

Adding to 3121232113 its reverse (3112321213), we get a palindrome (6233553326).

The spelling of 3121232113 in words is "three billion, one hundred twenty-one million, two hundred thirty-two thousand, one hundred thirteen".