11391320908871 has 2 divisors, whose sum is σ = 11391320908872. Its totient is φ = 11391320908870.

The previous prime is 11391320908771. The next prime is 11391320908883. The reversal of 11391320908871 is 17880902319311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11391320908871 - 2¹⁰ = 11391320907847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11391320908271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5695660454435 + 5695660454436.

It is an arithmetic number, because the mean of its divisors is an integer number (5695660454436).

Almost surely, 2^{11391320908871} is an apocalyptic number.

11391320908871 is a deficient number, since it is larger than the sum of its proper divisors (1).

11391320908871 is an equidigital number, since it uses as much as digits as its factorization.

11391320908871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 53.

The spelling of 11391320908871 in words is "eleven trillion, three hundred ninety-one billion, three hundred twenty million, nine hundred eight thousand, eight hundred seventy-one".