13340321221 has 4 divisors (see below), whose sum is σ = 13420203552. Its totient is φ = 13260438892.

The previous prime is 13340321207. The next prime is 13340321231. The reversal of 13340321221 is 12212304331.

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 13340321221 - 2⁹ = 13340320709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13340321192 and 13340321201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13340321231) 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, 39940915 + ... + 39941248.

It is an arithmetic number, because the mean of its divisors is an integer number (3355050888).

Almost surely, 2^13340321221 is an apocalyptic number.

It is an amenable number.

13340321221 is a deficient number, since it is larger than the sum of its proper divisors (79882331).

13340321221 is an equidigital number, since it uses as much as digits as its factorization.

13340321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79882330.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 13340321221 its reverse (12212304331), we get a palindrome (25552625552).

The spelling of 13340321221 in words is "thirteen billion, three hundred forty million, three hundred twenty-one thousand, two hundred twenty-one".