13230231221 has 4 divisors (see below), whose sum is σ = 13926559200. Its totient is φ = 12533903244.

The previous prime is 13230231211. The next prime is 13230231233. The reversal of 13230231221 is 12213203231.

13230231221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13230231221 - 2¹⁰ = 13230230197 is a prime.

It is a super-2 number, since 2×13230231221² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13230231193 and 13230231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13230231211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348163961 + ... + 348163998.

It is an arithmetic number, because the mean of its divisors is an integer number (3481639800).

Almost surely, 2^13230231221 is an apocalyptic number.

It is an amenable number.

13230231221 is a deficient number, since it is larger than the sum of its proper divisors (696327979).

13230231221 is an equidigital number, since it uses as much as digits as its factorization.

13230231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696327978.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13230231221 its reverse (12213203231), we get a palindrome (25443434452).

The spelling of 13230231221 in words is "thirteen billion, two hundred thirty million, two hundred thirty-one thousand, two hundred twenty-one".