12031321213013 has 4 divisors (see below), whose sum is σ = 12031604952780. Its totient is φ = 12031037473248.

The previous prime is 12031321213007. The next prime is 12031321213123. The reversal of 12031321213013 is 31031212313021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7653007689649 + 4378313523364 = 2766407^2 + 2092442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031321213013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12031321213013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031321213003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141806270 + ... + 141891087.

It is an arithmetic number, because the mean of its divisors is an integer number (3007901238195).

Almost surely, 2^{12031321213013} is an apocalyptic number.

It is an amenable number.

12031321213013 is a deficient number, since it is larger than the sum of its proper divisors (283739767).

12031321213013 is an equidigital number, since it uses as much as digits as its factorization.

12031321213013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283739766.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 12031321213013 its reverse (31031212313021), we get a palindrome (43062533526034).

The spelling of 12031321213013 in words is "twelve trillion, thirty-one billion, three hundred twenty-one million, two hundred thirteen thousand, thirteen".