13221001223 has 4 divisors (see below), whose sum is σ = 13280288448. Its totient is φ = 13161714000.

The previous prime is 13221001187. The next prime is 13221001229. The reversal of 13221001223 is 32210012231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32210012231 = 163 ⋅197607437.

It is a cyclic number.

It is not a de Polignac number, because 13221001223 - 2²² = 13216806919 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 (13221001229) 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, 29643278 + ... + 29643723.

It is an arithmetic number, because the mean of its divisors is an integer number (3320072112).

Almost surely, 2^13221001223 is an apocalyptic number.

13221001223 is a deficient number, since it is larger than the sum of its proper divisors (59287225).

13221001223 is an equidigital number, since it uses as much as digits as its factorization.

13221001223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59287224.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13221001223 its reverse (32210012231), we get a palindrome (45431013454).

The spelling of 13221001223 in words is "thirteen billion, two hundred twenty-one million, one thousand, two hundred twenty-three".