13321110991 has 2 divisors, whose sum is σ = 13321110992. Its totient is φ = 13321110990.

The previous prime is 13321110949. The next prime is 13321111003. The reversal of 13321110991 is 19901112331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13321110991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13321110791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660555495 + 6660555496.

It is an arithmetic number, because the mean of its divisors is an integer number (6660555496).

Almost surely, 2^13321110991 is an apocalyptic number.

13321110991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13321110991 is an equidigital number, since it uses as much as digits as its factorization.

13321110991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 13321110991 in words is "thirteen billion, three hundred twenty-one million, one hundred ten thousand, nine hundred ninety-one".