12311313201221 has 4 divisors (see below), whose sum is σ = 12311326167744. Its totient is φ = 12311300234700.

The previous prime is 12311313201193. The next prime is 12311313201241. The reversal of 12311313201221 is 12210231311321.

It is a happy number.

12311313201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12311313201221 - 2³⁴ = 12294133332037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311313201241) 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, 4935965 + ... + 6999026.

It is an arithmetic number, because the mean of its divisors is an integer number (3077831541936).

Almost surely, 2^{12311313201221} is an apocalyptic number.

It is an amenable number.

12311313201221 is a deficient number, since it is larger than the sum of its proper divisors (12966523).

12311313201221 is a wasteful number, since it uses less digits than its factorization.

12311313201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12966522.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 12311313201221 its reverse (12210231311321), we get a palindrome (24521544512542).

The spelling of 12311313201221 in words is "twelve trillion, three hundred eleven billion, three hundred thirteen million, two hundred one thousand, two hundred twenty-one".