3131244331321 has 4 divisors (see below), whose sum is σ = 3184316269200. Its totient is φ = 3078172393444.

The previous prime is 3131244331301. The next prime is 3131244331337. The reversal of 3131244331321 is 1231334421313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3131244331321 - 2³¹ = 3129096847673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131244331301) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 26535968851 + ... + 26535968968.

It is an arithmetic number, because the mean of its divisors is an integer number (796079067300).

Almost surely, 2^{3131244331321} is an apocalyptic number.

It is an amenable number.

3131244331321 is a deficient number, since it is larger than the sum of its proper divisors (53071937879).

3131244331321 is an equidigital number, since it uses as much as digits as its factorization.

3131244331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53071937878.

The product of its digits is 15552, while the sum is 31.

Adding to 3131244331321 its reverse (1231334421313), we get a palindrome (4362578752634).

The spelling of 3131244331321 in words is "three trillion, one hundred thirty-one billion, two hundred forty-four million, three hundred thirty-one thousand, three hundred twenty-one".