11005511011111 has 2 divisors, whose sum is σ = 11005511011112. Its totient is φ = 11005511011110.

The previous prime is 11005511011087. The next prime is 11005511011129. The reversal of 11005511011111 is 11111011550011.

It is a strong prime.

It is an emirp because it is prime and its reverse (11111011550011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11005511011111 - 2³¹ = 11003363527463 is a prime.

It is a super-2 number, since 2×11005511011111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11005511011151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5502755505555 + 5502755505556.

It is an arithmetic number, because the mean of its divisors is an integer number (5502755505556).

Almost surely, 2^{11005511011111} is an apocalyptic number.

11005511011111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11005511011111 is an equidigital number, since it uses as much as digits as its factorization.

11005511011111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25, while the sum is 19.

Adding to 11005511011111 its reverse (11111011550011), we get a palindrome (22116522561122).

The spelling of 11005511011111 in words is "eleven trillion, five billion, five hundred eleven million, eleven thousand, one hundred eleven".