13031132321 has 2 divisors, whose sum is σ = 13031132322. Its totient is φ = 13031132320.

The previous prime is 13031132297. The next prime is 13031132347. The reversal of 13031132321 is 12323113031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10205040400 + 2826091921 = 101020^2 + 53161^2 .

It is an emirp because it is prime and its reverse (12323113031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13031132321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13031132293 and 13031132302.

It is not a weakly prime, because it can be changed into another prime (13031132921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515566160 + 6515566161.

It is an arithmetic number, because the mean of its divisors is an integer number (6515566161).

Almost surely, 2^13031132321 is an apocalyptic number.

It is an amenable number.

13031132321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13031132321 is an equidigital number, since it uses as much as digits as its factorization.

13031132321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13031132321 its reverse (12323113031), we get a palindrome (25354245352).

The spelling of 13031132321 in words is "thirteen billion, thirty-one million, one hundred thirty-two thousand, three hundred twenty-one".