13031203321 has 2 divisors, whose sum is σ = 13031203322. Its totient is φ = 13031203320.

The previous prime is 13031203319. The next prime is 13031203351. The reversal of 13031203321 is 12330213031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12379677696 + 651525625 = 111264^2 + 25525^2 .

It is a cyclic number.

It is not a de Polignac number, because 13031203321 - 2¹ = 13031203319 is a prime.

Together with 13031203319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13031203301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515601660 + 6515601661.

It is an arithmetic number, because the mean of its divisors is an integer number (6515601661).

Almost surely, 2^13031203321 is an apocalyptic number.

It is an amenable number.

13031203321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13031203321 is an equidigital number, since it uses as much as digits as its factorization.

13031203321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 13031203321 its reverse (12330213031), we get a palindrome (25361416352).

The spelling of 13031203321 in words is "thirteen billion, thirty-one million, two hundred three thousand, three hundred twenty-one".