13313233301221 has 4 divisors (see below), whose sum is σ = 15215123772832. Its totient is φ = 11411342829612.

The previous prime is 13313233301209. The next prime is 13313233301243. The reversal of 13313233301221 is 12210333231331.

It is a happy number.

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 13313233301221 - 2¹³ = 13313233293029 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 13313233301221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13313233301021) 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, 950945235795 + ... + 950945235808.

It is an arithmetic number, because the mean of its divisors is an integer number (3803780943208).

Almost surely, 2^{13313233301221} is an apocalyptic number.

It is an amenable number.

13313233301221 is a deficient number, since it is larger than the sum of its proper divisors (1901890471611).

13313233301221 is an equidigital number, since it uses as much as digits as its factorization.

13313233301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901890471610.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 13313233301221 its reverse (12210333231331), we get a palindrome (25523566532552).

The spelling of 13313233301221 in words is "thirteen trillion, three hundred thirteen billion, two hundred thirty-three million, three hundred one thousand, two hundred twenty-one".