12031320323031 has 4 divisors (see below), whose sum is σ = 16041760430712. Its totient is φ = 8020880215352.

The previous prime is 12031320322993. The next prime is 12031320323051. The reversal of 12031320323031 is 13032302313021.

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 12031320323031 - 2¹⁴ = 12031320306647 is a prime.

It is a super-2 number, since 2×12031320323031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12031320322992 and 12031320323010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031320323051) 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, 2005220053836 + ... + 2005220053841.

It is an arithmetic number, because the mean of its divisors is an integer number (4010440107678).

Almost surely, 2^{12031320323031} is an apocalyptic number.

12031320323031 is a deficient number, since it is larger than the sum of its proper divisors (4010440107681).

12031320323031 is an equidigital number, since it uses as much as digits as its factorization.

12031320323031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010440107680.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 12031320323031 its reverse (13032302313021), we get a palindrome (25063622636052).

The spelling of 12031320323031 in words is "twelve trillion, thirty-one billion, three hundred twenty million, three hundred twenty-three thousand, thirty-one".