13203312321 has 16 divisors (see below), whose sum is σ = 17872467200. Its totient is φ = 8668261008.

The previous prime is 13203312313. The next prime is 13203312341. The reversal of 13203312321 is 12321330231.

13203312321 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 13203312321 - 2³ = 13203312313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13203312341) 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 15 ways as a sum of consecutive naturals, for example, 864570 + ... + 879708.

It is an arithmetic number, because the mean of its divisors is an integer number (1117029200).

Almost surely, 2^13203312321 is an apocalyptic number.

It is an amenable number.

13203312321 is a deficient number, since it is larger than the sum of its proper divisors (4669154879).

13203312321 is a wasteful number, since it uses less digits than its factorization.

13203312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19548.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 13203312321 its reverse (12321330231), we get a palindrome (25524642552).

The spelling of 13203312321 in words is "thirteen billion, two hundred three million, three hundred twelve thousand, three hundred twenty-one".