13001232321 has 120 divisors (see below), whose sum is σ = 25188506112. Its totient is φ = 6534950400.

The previous prime is 13001232313. The next prime is 13001232323. The reversal of 13001232321 is 12323210031.

13001232321 is a `hidden beast` number, since 1 + 300 + 12 + 32 + 321 = 666.

It is not a de Polignac number, because 13001232321 - 2³ = 13001232313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13001232294 and 13001232303.

It is not an unprimeable number, because it can be changed into a prime (13001232323) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2123761 + ... + 2129873.

Almost surely, 2^13001232321 is an apocalyptic number.

13001232321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13001232321 is a deficient number, since it is larger than the sum of its proper divisors (12187273791).

13001232321 is a wasteful number, since it uses less digits than its factorization.

13001232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6185 (or 6165 counting only the distinct ones).

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

Adding to 13001232321 its reverse (12323210031), we get a palindrome (25324442352).

The spelling of 13001232321 in words is "thirteen billion, one million, two hundred thirty-two thousand, three hundred twenty-one".