71143107811 has 2 divisors, whose sum is σ = 71143107812. Its totient is φ = 71143107810.

The previous prime is 71143107809. The next prime is 71143107857. The reversal of 71143107811 is 11870134117.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71143107811 - 2¹ = 71143107809 is a prime.

It is a super-3 number, since 3×71143107811³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 71143107809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71143107911) 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 as a sum of consecutive naturals, namely, 35571553905 + 35571553906.

It is an arithmetic number, because the mean of its divisors is an integer number (35571553906).

Almost surely, 2^71143107811 is an apocalyptic number.

71143107811 is a deficient number, since it is larger than the sum of its proper divisors (1).

71143107811 is an equidigital number, since it uses as much as digits as its factorization.

71143107811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 34.

The spelling of 71143107811 in words is "seventy-one billion, one hundred forty-three million, one hundred seven thousand, eight hundred eleven".