11118206861 has 2 divisors, whose sum is σ = 11118206862. Its totient is φ = 11118206860.

The previous prime is 11118206821. The next prime is 11118206881. The reversal of 11118206861 is 16860281111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10575037225 + 543169636 = 102835^2 + 23306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11118206861 is a prime.

It is a super-2 number, since 2×11118206861² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11118206821) 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, 5559103430 + 5559103431.

It is an arithmetic number, because the mean of its divisors is an integer number (5559103431).

Almost surely, 2^11118206861 is an apocalyptic number.

It is an amenable number.

11118206861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11118206861 is an equidigital number, since it uses as much as digits as its factorization.

11118206861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 35.

Adding to 11118206861 its reverse (16860281111), we get a palindrome (27978487972).

The spelling of 11118206861 in words is "eleven billion, one hundred eighteen million, two hundred six thousand, eight hundred sixty-one".