12321432031 has 4 divisors (see below), whose sum is σ = 12321778464. Its totient is φ = 12321085600.

The previous prime is 12321432001. The next prime is 12321432059. The reversal of 12321432031 is 13023412321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13023412321 = 86923 ⋅149827.

It is a cyclic number.

It is not a de Polignac number, because 12321432031 - 2¹³ = 12321423839 is a prime.

It is a super-3 number, since 3×12321432031³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12321431993 and 12321432011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321432001) 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, 112855 + ... + 193336.

It is an arithmetic number, because the mean of its divisors is an integer number (3080444616).

Almost surely, 2^12321432031 is an apocalyptic number.

12321432031 is a deficient number, since it is larger than the sum of its proper divisors (346433).

12321432031 is an equidigital number, since it uses as much as digits as its factorization.

12321432031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346432.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 12321432031 its reverse (13023412321), we get a palindrome (25344844352).

The spelling of 12321432031 in words is "twelve billion, three hundred twenty-one million, four hundred thirty-two thousand, thirty-one".