11243440181 has 2 divisors, whose sum is σ = 11243440182. Its totient is φ = 11243440180.

The previous prime is 11243440111. The next prime is 11243440199. The reversal of 11243440181 is 18104434211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10138476100 + 1104964081 = 100690^2 + 33241^2 .

It is a cyclic number.

It is not a de Polignac number, because 11243440181 - 2¹⁰ = 11243439157 is a prime.

It is a super-2 number, since 2×11243440181² (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 (11243440111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5621720090 + 5621720091.

It is an arithmetic number, because the mean of its divisors is an integer number (5621720091).

Almost surely, 2^11243440181 is an apocalyptic number.

It is an amenable number.

11243440181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11243440181 is an equidigital number, since it uses as much as digits as its factorization.

11243440181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 29.

Adding to 11243440181 its reverse (18104434211), we get a palindrome (29347874392).

The spelling of 11243440181 in words is "eleven billion, two hundred forty-three million, four hundred forty thousand, one hundred eighty-one".