111111101089 has 2 divisors, whose sum is σ = 111111101090. Its totient is φ = 111111101088.

The previous prime is 111111101083. The next prime is 111111101119. The reversal of 111111101089 is 980101111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110021573025 + 1089528064 = 331695^2 + 33008^2 .

It is an emirp because it is prime and its reverse (980101111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111111101089 - 2⁹ = 111111100577 is a prime.

It is not a weakly prime, because it can be changed into another prime (111111101083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555550544 + 55555550545.

It is an arithmetic number, because the mean of its divisors is an integer number (55555550545).

Almost surely, 2^111111101089 is an apocalyptic number.

It is an amenable number.

111111101089 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111101089 is an equidigital number, since it uses as much as digits as its factorization.

111111101089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 25.

The spelling of 111111101089 in words is "one hundred eleven billion, one hundred eleven million, one hundred one thousand, eighty-nine".