11222011181 has 2 divisors, whose sum is σ = 11222011182. Its totient is φ = 11222011180.

The previous prime is 11222011169. The next prime is 11222011201. The reversal of 11222011181 is 18111022211.

It is a happy number.

11222011181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (11222011201) can be obtained adding 11222011181 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8053447081 + 3168564100 = 89741^2 + 56290^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222011181 - 2¹⁰ = 11222010157 is a prime.

It is a super-2 number, since 2×11222011181² (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 (11222011481) 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, 5611005590 + 5611005591.

It is an arithmetic number, because the mean of its divisors is an integer number (5611005591).

Almost surely, 2^11222011181 is an apocalyptic number.

It is an amenable number.

11222011181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222011181 is an equidigital number, since it uses as much as digits as its factorization.

11222011181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 11222011181 its reverse (18111022211), we get a palindrome (29333033392).

The spelling of 11222011181 in words is "eleven billion, two hundred twenty-two million, eleven thousand, one hundred eighty-one".