71111217117 has 4 divisors (see below), whose sum is σ = 94814956160. Its totient is φ = 47407478076.

The previous prime is 71111217101. The next prime is 71111217143. The reversal of 71111217117 is 71171211117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 71111217117 - 2⁴ = 71111217101 is a prime.

It is a super-2 number, since 2×71111217117² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71111217197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11851869517 + ... + 11851869522.

It is an arithmetic number, because the mean of its divisors is an integer number (23703739040).

Almost surely, 2^71111217117 is an apocalyptic number.

It is an amenable number.

71111217117 is a deficient number, since it is larger than the sum of its proper divisors (23703739043).

71111217117 is a wasteful number, since it uses less digits than its factorization.

71111217117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23703739042.

The product of its digits is 686, while the sum is 30.

The spelling of 71111217117 in words is "seventy-one billion, one hundred eleven million, two hundred seventeen thousand, one hundred seventeen".