11102020111181 has 2 divisors, whose sum is σ = 11102020111182. Its totient is φ = 11102020111180.

The previous prime is 11102020111153. The next prime is 11102020111241. The reversal of 11102020111181 is 18111102020111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6561072208681 + 4540947902500 = 2561459^2 + 2130950^2 .

It is an emirp because it is prime and its reverse (18111102020111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11102020111181 is a prime.

It is a super-2 number, since 2×11102020111181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11102020141181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551010055590 + 5551010055591.

It is an arithmetic number, because the mean of its divisors is an integer number (5551010055591).

Almost surely, 2^{11102020111181} is an apocalyptic number.

It is an amenable number.

11102020111181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11102020111181 is an equidigital number, since it uses as much as digits as its factorization.

11102020111181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 20.

Adding to 11102020111181 its reverse (18111102020111), we get a palindrome (29213122131292).

The spelling of 11102020111181 in words is "eleven trillion, one hundred two billion, twenty million, one hundred eleven thousand, one hundred eighty-one".