111101111020189 has 2 divisors, whose sum is σ = 111101111020190. Its totient is φ = 111101111020188.

The previous prime is 111101111020187. The next prime is 111101111020217. The reversal of 111101111020189 is 981020111101111.

It is an a-pointer prime, because the next prime (111101111020217) can be obtained adding 111101111020189 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73789989812100 + 37311121208089 = 8590110^2 + 6108283^2 .

It is an emirp because it is prime and its reverse (981020111101111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111101111020189 - 2¹ = 111101111020187 is a prime.

Together with 111101111020187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111101111020187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550555510094 + 55550555510095.

It is an arithmetic number, because the mean of its divisors is an integer number (55550555510095).

Almost surely, 2^{111101111020189} is an apocalyptic number.

It is an amenable number.

111101111020189 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101111020189 is an equidigital number, since it uses as much as digits as its factorization.

111101111020189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 28.

The spelling of 111101111020189 in words is "one hundred eleven trillion, one hundred one billion, one hundred eleven million, twenty thousand, one hundred eighty-nine".