11111020189 has 2 divisors, whose sum is σ = 11111020190. Its totient is φ = 11111020188.

The previous prime is 11111020187. The next prime is 11111020211. The reversal of 11111020189 is 98102011111.

11111020189 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., 9971620164 + 1139400025 = 99858^2 + 33755^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111020189 - 2¹ = 11111020187 is a prime.

It is a super-4 number, since 4×11111020189⁴ (a number of 41 digits) contains 4444 as substring.

Together with 11111020187, 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 (11111020181) 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, 5555510094 + 5555510095.

It is an arithmetic number, because the mean of its divisors is an integer number (5555510095).

Almost surely, 2^11111020189 is an apocalyptic number.

It is an amenable number.

11111020189 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111020189 is an equidigital number, since it uses as much as digits as its factorization.

11111020189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 25.

The spelling of 11111020189 in words is "eleven billion, one hundred eleven million, twenty thousand, one hundred eighty-nine".