12321322031 has 4 divisors (see below), whose sum is σ = 12718784064. Its totient is φ = 11923860000.

The previous prime is 12321322007. The next prime is 12321322051. The reversal of 12321322031 is 13022312321.

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 12321322031 - 2⁶ = 12321321967 is a prime.

It is a super-2 number, since 2×12321322031² (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 = 12321321994 and 12321322012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321322051) 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, 198730970 + ... + 198731031.

It is an arithmetic number, because the mean of its divisors is an integer number (3179696016).

Almost surely, 2^12321322031 is an apocalyptic number.

12321322031 is a deficient number, since it is larger than the sum of its proper divisors (397462033).

12321322031 is an equidigital number, since it uses as much as digits as its factorization.

12321322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397462032.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12321322031 its reverse (13022312321), we get a palindrome (25343634352).

The spelling of 12321322031 in words is "twelve billion, three hundred twenty-one million, three hundred twenty-two thousand, thirty-one".