3121313031330 has 128 divisors (see below), whose sum is σ = 8339982013440. Its totient is φ = 742706288640.

The previous prime is 3121313031251. The next prime is 3121313031373. The reversal of 3121313031330 is 331303131213.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121313031330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 847479 + ... + 2638341.

It is an arithmetic number, because the mean of its divisors is an integer number (65156109480).

Almost surely, 2^{3121313031330} is an apocalyptic number.

3121313031330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121313031330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4169991006720).

3121313031330 is an abundant number, since it is smaller than the sum of its proper divisors (5218668982110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121313031330 is a wasteful number, since it uses less digits than its factorization.

3121313031330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791036.

The product of its (nonzero) digits is 1458, while the sum is 24.

Adding to 3121313031330 its reverse (331303131213), we get a palindrome (3452616162543).

The spelling of 3121313031330 in words is "three trillion, one hundred twenty-one billion, three hundred thirteen million, thirty-one thousand, three hundred thirty".