11118206881 has 2 divisors, whose sum is σ = 11118206882. Its totient is φ = 11118206880.

The previous prime is 11118206861. The next prime is 11118206921. The reversal of 11118206881 is 18860281111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6783169600 + 4335037281 = 82360^2 + 65841^2 .

It is a cyclic number.

It is not a de Polignac number, because 11118206881 - 2⁹ = 11118206369 is a prime.

It is a super-2 number, since 2×11118206881² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11118206881.

It is not a weakly prime, because it can be changed into another prime (11118206821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5559103440 + 5559103441.

It is an arithmetic number, because the mean of its divisors is an integer number (5559103441).

Almost surely, 2^11118206881 is an apocalyptic number.

It is an amenable number.

11118206881 is a deficient number, since it is larger than the sum of its proper divisors (1).

11118206881 is an equidigital number, since it uses as much as digits as its factorization.

11118206881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 37.

Adding to 11118206881 its reverse (18860281111), we get a palindrome (29978487992).

The spelling of 11118206881 in words is "eleven billion, one hundred eighteen million, two hundred six thousand, eight hundred eighty-one".