11185351181 has 2 divisors, whose sum is σ = 11185351182. Its totient is φ = 11185351180.

The previous prime is 11185351169. The next prime is 11185351183. The reversal of 11185351181 is 18115358111.

It is a happy number.

11185351181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8517628681 + 2667722500 = 92291^2 + 51650^2 .

It is an emirp because it is prime and its reverse (18115358111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11185351181 is a prime.

It is a super-2 number, since 2×11185351181² (a number of 21 digits) contains 22 as substring.

Together with 11185351183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11185351183) 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, 5592675590 + 5592675591.

It is an arithmetic number, because the mean of its divisors is an integer number (5592675591).

Almost surely, 2^11185351181 is an apocalyptic number.

It is an amenable number.

11185351181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11185351181 is an equidigital number, since it uses as much as digits as its factorization.

11185351181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 35.

The spelling of 11185351181 in words is "eleven billion, one hundred eighty-five million, three hundred fifty-one thousand, one hundred eighty-one".