11118182381 has 2 divisors, whose sum is σ = 11118182382. Its totient is φ = 11118182380.

The previous prime is 11118182363. The next prime is 11118182441. The reversal of 11118182381 is 18328181111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9733598281 + 1384584100 = 98659^2 + 37210^2 .

It is a cyclic number.

It is not a de Polignac number, because 11118182381 - 2¹⁰ = 11118181357 is a prime.

It is a super-2 number, since 2×11118182381² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11118182321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5559091190 + 5559091191.

It is an arithmetic number, because the mean of its divisors is an integer number (5559091191).

Almost surely, 2^11118182381 is an apocalyptic number.

It is an amenable number.

11118182381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11118182381 is an equidigital number, since it uses as much as digits as its factorization.

11118182381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 35.

The spelling of 11118182381 in words is "eleven billion, one hundred eighteen million, one hundred eighty-two thousand, three hundred eighty-one".