13001233221 has 24 divisors (see below), whose sum is σ = 19068352160. Its totient is φ = 8535178656.

The previous prime is 13001233183. The next prime is 13001233243. The reversal of 13001233221 is 12233210031.

13001233221 is a `hidden beast` number, since 1 + 300 + 12 + 332 + 21 = 666.

13001233221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13001233221 - 2¹⁹ = 13000708933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13001233194 and 13001233203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13001233121) 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 23 ways as a sum of consecutive naturals, for example, 119250 + ... + 200556.

Almost surely, 2^13001233221 is an apocalyptic number.

It is an amenable number.

13001233221 is a deficient number, since it is larger than the sum of its proper divisors (6067118939).

13001233221 is a wasteful number, since it uses less digits than its factorization.

13001233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81585 (or 81582 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13001233221 its reverse (12233210031), we get a palindrome (25234443252).

The spelling of 13001233221 in words is "thirteen billion, one million, two hundred thirty-three thousand, two hundred twenty-one".