71911211011 has 4 divisors (see below), whose sum is σ = 72312949800. Its totient is φ = 71509472224.

The previous prime is 71911211003. The next prime is 71911211041. The reversal of 71911211011 is 11011211917.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71911211011 - 2³ = 71911211003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71911211041) 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, 200869126 + ... + 200869483.

It is an arithmetic number, because the mean of its divisors is an integer number (18078237450).

Almost surely, 2^71911211011 is an apocalyptic number.

71911211011 is a deficient number, since it is larger than the sum of its proper divisors (401738789).

71911211011 is a wasteful number, since it uses less digits than its factorization.

71911211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401738788.

The product of its (nonzero) digits is 126, while the sum is 25.

Adding to 71911211011 its reverse (11011211917), we get a palindrome (82922422928).

The spelling of 71911211011 in words is "seventy-one billion, nine hundred eleven million, two hundred eleven thousand, eleven".