11111220163 has 2 divisors, whose sum is σ = 11111220164. Its totient is φ = 11111220162.

The previous prime is 11111220161. The next prime is 11111220173. The reversal of 11111220163 is 36102211111.

11111220163 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 is a cyclic number.

It is not a de Polignac number, because 11111220163 - 2¹ = 11111220161 is a prime.

Together with 11111220161, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11111220163.

It is not a weakly prime, because it can be changed into another prime (11111220161) 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, 5555610081 + 5555610082.

It is an arithmetic number, because the mean of its divisors is an integer number (5555610082).

Almost surely, 2^11111220163 is an apocalyptic number.

11111220163 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111220163 is an equidigital number, since it uses as much as digits as its factorization.

11111220163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11111220163 its reverse (36102211111), we get a palindrome (47213431274).

The spelling of 11111220163 in words is "eleven billion, one hundred eleven million, two hundred twenty thousand, one hundred sixty-three".