10511111111 has 2 divisors, whose sum is σ = 10511111112. Its totient is φ = 10511111110.

The previous prime is 10511111063. The next prime is 10511111173. The reversal of 10511111111 is 11111111501.

10511111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10511111111 is a prime.

It is a super-2 number, since 2×10511111111² (a number of 21 digits) contains 22 as substring.

10511111111 is a modest number, since divided by 111111 gives 10511 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10511110111) 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, 5255555555 + 5255555556.

It is an arithmetic number, because the mean of its divisors is an integer number (5255555556).

Almost surely, 2^10511111111 is an apocalyptic number.

10511111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10511111111 is an equidigital number, since it uses as much as digits as its factorization.

10511111111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5, while the sum is 14.

Adding to 10511111111 its reverse (11111111501), we get a palindrome (21622222612).

The spelling of 10511111111 in words is "ten billion, five hundred eleven million, one hundred eleven thousand, one hundred eleven".