71111211011 has 2 divisors, whose sum is σ = 71111211012. Its totient is φ = 71111211010.

The previous prime is 71111211001. The next prime is 71111211029. The reversal of 71111211011 is 11011211117.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71111211011 is a prime.

It is not a weakly prime, because it can be changed into another prime (71111211001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35555605505 + 35555605506.

It is an arithmetic number, because the mean of its divisors is an integer number (35555605506).

Almost surely, 2^71111211011 is an apocalyptic number.

71111211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

71111211011 is an equidigital number, since it uses as much as digits as its factorization.

71111211011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14, while the sum is 17.

Adding to 71111211011 its reverse (11011211117), we get a palindrome (82122422128).

The spelling of 71111211011 in words is "seventy-one billion, one hundred eleven million, two hundred eleven thousand, eleven".