13320310311221 has 4 divisors (see below), whose sum is σ = 13408524286944. Its totient is φ = 13232096335500.

The previous prime is 13320310311169. The next prime is 13320310311263. The reversal of 13320310311221 is 12211301302331.

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 13320310311221 - 2¹⁸ = 13320310049077 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 (13320310311281) 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, 44106987635 + ... + 44106987936.

It is an arithmetic number, because the mean of its divisors is an integer number (3352131071736).

Almost surely, 2^{13320310311221} is an apocalyptic number.

It is an amenable number.

13320310311221 is a deficient number, since it is larger than the sum of its proper divisors (88213975723).

13320310311221 is an equidigital number, since it uses as much as digits as its factorization.

13320310311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88213975722.

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

Adding to 13320310311221 its reverse (12211301302331), we get a palindrome (25531611613552).

The spelling of 13320310311221 in words is "thirteen trillion, three hundred twenty billion, three hundred ten million, three hundred eleven thousand, two hundred twenty-one".