13223021 has 16 divisors (see below), whose sum is σ = 15569280. Its totient is φ = 10996800.

The previous prime is 13223003. The next prime is 13223029. The reversal of 13223021 is 12032231.

It is a happy number.

13223021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13223021 - 2¹⁰ = 13221997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13222987 and 13223005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223029) 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, 41555 + ... + 41871.

It is an arithmetic number, because the mean of its divisors is an integer number (973080).

Almost surely, 2^13223021 is an apocalyptic number.

It is an amenable number.

13223021 is a deficient number, since it is larger than the sum of its proper divisors (2346259).

13223021 is a wasteful number, since it uses less digits than its factorization.

13223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13223021 is about 3636.3472056447. The cubic root of 13223021 is about 236.4704598325.

Adding to 13223021 its reverse (12032231), we get a palindrome (25255252).

The spelling of 13223021 in words is "thirteen million, two hundred twenty-three thousand, twenty-one".