3121320232231 has 4 divisors (see below), whose sum is σ = 3121327251952. Its totient is φ = 3121313212512.

The previous prime is 3121320232229. The next prime is 3121320232253. The reversal of 3121320232231 is 1322320231213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3121320232231 - 2¹ = 3121320232229 is a prime.

It is a super-2 number, since 2×3121320232231² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121320232196 and 3121320232205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121320232831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2794251 + ... + 3748396.

It is an arithmetic number, because the mean of its divisors is an integer number (780331812988).

Almost surely, 2^{3121320232231} is an apocalyptic number.

3121320232231 is a deficient number, since it is larger than the sum of its proper divisors (7019721).

3121320232231 is an equidigital number, since it uses as much as digits as its factorization.

3121320232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7019720.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 3121320232231 its reverse (1322320231213), we get a palindrome (4443640463444).

The spelling of 3121320232231 in words is "three trillion, one hundred twenty-one billion, three hundred twenty million, two hundred thirty-two thousand, two hundred thirty-one".