12321313031 has 4 divisors (see below), whose sum is σ = 12326350752. Its totient is φ = 12316275312.

The previous prime is 12321313019. The next prime is 12321313063. The reversal of 12321313031 is 13031312321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13031312321 = 367 ⋅35507663.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12321313031 is a prime.

It is a super-2 number, since 2×12321313031² (a number of 21 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 = 12321312994 and 12321313012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321313001) 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, 2515190 + ... + 2520083.

It is an arithmetic number, because the mean of its divisors is an integer number (3081587688).

Almost surely, 2^12321313031 is an apocalyptic number.

12321313031 is a deficient number, since it is larger than the sum of its proper divisors (5037721).

12321313031 is an equidigital number, since it uses as much as digits as its factorization.

12321313031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5037720.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 12321313031 its reverse (13031312321), we get a palindrome (25352625352).

The spelling of 12321313031 in words is "twelve billion, three hundred twenty-one million, three hundred thirteen thousand, thirty-one".