13230021 has 16 divisors (see below), whose sum is σ = 20463104. Its totient is φ = 7446384.

The previous prime is 13230013. The next prime is 13230043. The reversal of 13230021 is 12003231.

It is a happy number.

13230021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13230021 - 2³ = 13230013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13229979 and 13230006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13230001) 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, 3295 + ... + 6108.

It is an arithmetic number, because the mean of its divisors is an integer number (1278944).

Almost surely, 2^13230021 is an apocalyptic number.

It is an amenable number.

13230021 is a deficient number, since it is larger than the sum of its proper divisors (7233083).

13230021 is an equidigital number, since it uses as much as digits as its factorization.

13230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9480.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 13230021 is about 3637.3095826448. The cubic root of 13230021 is about 236.5121800317.

Adding to 13230021 its reverse (12003231), we get a palindrome (25233252).

The spelling of 13230021 in words is "thirteen million, two hundred thirty thousand, twenty-one".