13313213331221 has 4 divisors (see below), whose sum is σ = 13892048693472. Its totient is φ = 12734377968972.

The previous prime is 13313213331149. The next prime is 13313213331233. The reversal of 13313213331221 is 12213331231331.

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 13313213331221 - 2²² = 13313209136917 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 (13313213361221) 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, 289417681091 + ... + 289417681136.

It is an arithmetic number, because the mean of its divisors is an integer number (3473012173368).

Almost surely, 2^{13313213331221} is an apocalyptic number.

It is an amenable number.

13313213331221 is a deficient number, since it is larger than the sum of its proper divisors (578835362251).

13313213331221 is an equidigital number, since it uses as much as digits as its factorization.

13313213331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578835362250.

The product of its digits is 5832, while the sum is 29.

Adding to 13313213331221 its reverse (12213331231331), we get a palindrome (25526544562552).

The spelling of 13313213331221 in words is "thirteen trillion, three hundred thirteen billion, two hundred thirteen million, three hundred thirty-one thousand, two hundred twenty-one".