13221223215205 has 8 divisors (see below), whose sum is σ = 15986578300704. Its totient is φ = 10496238277200.

The previous prime is 13221223215181. The next prime is 13221223215223. The reversal of 13221223215205 is 50251232212231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13221223215205 - 2⁷ = 13221223215077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10092536151 + ... + 10092537460.

It is an arithmetic number, because the mean of its divisors is an integer number (1998322287588).

Almost surely, 2^{13221223215205} is an apocalyptic number.

It is an amenable number.

13221223215205 is a deficient number, since it is larger than the sum of its proper divisors (2765355085499).

13221223215205 is a wasteful number, since it uses less digits than its factorization.

13221223215205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20185073747.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 13221223215205 its reverse (50251232212231), we get a palindrome (63472455427436).

The spelling of 13221223215205 in words is "thirteen trillion, two hundred twenty-one billion, two hundred twenty-three million, two hundred fifteen thousand, two hundred five".