13221212230221 has 16 divisors (see below), whose sum is σ = 18099946112640. Its totient is φ = 8579302894080.

The previous prime is 13221212230207. The next prime is 13221212230271. The reversal of 13221212230221 is 12203221212231.

It is not a de Polignac number, because 13221212230221 - 2¹⁴ = 13221212213837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13221212230191 and 13221212230200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221212230201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124068601 + ... + 124175118.

It is an arithmetic number, because the mean of its divisors is an integer number (1131246632040).

Almost surely, 2^{13221212230221} is an apocalyptic number.

It is an amenable number.

13221212230221 is a deficient number, since it is larger than the sum of its proper divisors (4878733882419).

13221212230221 is a wasteful number, since it uses less digits than its factorization.

13221212230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248244196.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 13221212230221 its reverse (12203221212231), we get a palindrome (25424433442452).

The spelling of 13221212230221 in words is "thirteen trillion, two hundred twenty-one billion, two hundred twelve million, two hundred thirty thousand, two hundred twenty-one".