11171070511 has 2 divisors, whose sum is σ = 11171070512. Its totient is φ = 11171070510.

The previous prime is 11171070509. The next prime is 11171070517. The reversal of 11171070511 is 11507017111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11171070511 - 2¹ = 11171070509 is a prime.

It is a super-2 number, since 2×11171070511² (a number of 21 digits) contains 22 as substring.

Together with 11171070509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11171070517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5585535255 + 5585535256.

It is an arithmetic number, because the mean of its divisors is an integer number (5585535256).

Almost surely, 2^11171070511 is an apocalyptic number.

11171070511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11171070511 is an equidigital number, since it uses as much as digits as its factorization.

11171070511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 245, while the sum is 25.

Adding to 11171070511 its reverse (11507017111), we get a palindrome (22678087622).

The spelling of 11171070511 in words is "eleven billion, one hundred seventy-one million, seventy thousand, five hundred eleven".