11155002181 has 2 divisors, whose sum is σ = 11155002182. Its totient is φ = 11155002180.

The previous prime is 11155002127. The next prime is 11155002253. The reversal of 11155002181 is 18120055111.

11155002181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8748609156 + 2406393025 = 93534^2 + 49055^2 .

It is a cyclic number.

It is not a de Polignac number, because 11155002181 - 2¹⁷ = 11154871109 is a prime.

It is a super-2 number, since 2×11155002181² (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 (11155002281) 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, 5577501090 + 5577501091.

It is an arithmetic number, because the mean of its divisors is an integer number (5577501091).

Almost surely, 2^11155002181 is an apocalyptic number.

It is an amenable number.

11155002181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155002181 is an equidigital number, since it uses as much as digits as its factorization.

11155002181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 25.

Adding to 11155002181 its reverse (18120055111), we get a palindrome (29275057292).

The spelling of 11155002181 in words is "eleven billion, one hundred fifty-five million, two thousand, one hundred eighty-one".