13221101201221 has 8 divisors (see below), whose sum is σ = 13247725665024. Its totient is φ = 13194502907040.

The previous prime is 13221101201219. The next prime is 13221101201233. The reversal of 13221101201221 is 12210210112231.

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

It is a cyclic number.

It is not a de Polignac number, because 13221101201221 - 2¹ = 13221101201219 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 (13221101201261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5530816 + ... + 7551961.

It is an arithmetic number, because the mean of its divisors is an integer number (1655965708128).

Almost surely, 2^{13221101201221} is an apocalyptic number.

It is an amenable number.

13221101201221 is a deficient number, since it is larger than the sum of its proper divisors (26624463803).

13221101201221 is a wasteful number, since it uses less digits than its factorization.

13221101201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13084811.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 13221101201221 its reverse (12210210112231), we get a palindrome (25431311313452).

The spelling of 13221101201221 in words is "thirteen trillion, two hundred twenty-one billion, one hundred one million, two hundred one thousand, two hundred twenty-one".