12311324132221 has 16 divisors (see below), whose sum is σ = 12624294216960. Its totient is φ = 12000510624960.

The previous prime is 12311324132203. The next prime is 12311324132231. The reversal of 12311324132221 is 12223142311321.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12311324132221 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 12311324132221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311324132231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37398475 + ... + 37726231.

It is an arithmetic number, because the mean of its divisors is an integer number (789018388560).

Almost surely, 2^{12311324132221} is an apocalyptic number.

It is an amenable number.

12311324132221 is a deficient number, since it is larger than the sum of its proper divisors (312970084739).

12311324132221 is a wasteful number, since it uses less digits than its factorization.

12311324132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331044.

The product of its digits is 3456, while the sum is 28.

Adding to 12311324132221 its reverse (12223142311321), we get a palindrome (24534466443542).

The spelling of 12311324132221 in words is "twelve trillion, three hundred eleven billion, three hundred twenty-four million, one hundred thirty-two thousand, two hundred twenty-one".