111000100019989 has 2 divisors, whose sum is σ = 111000100019990. Its totient is φ = 111000100019988.

The previous prime is 111000100019833. The next prime is 111000100020001. The reversal of 111000100019989 is 989910001000111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86448768715089 + 24551331304900 = 9297783^2 + 4954930^2 .

It is an emirp because it is prime and its reverse (989910001000111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111000100019989 - 2²⁵ = 111000066465557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111000100019189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500050009994 + 55500050009995.

It is an arithmetic number, because the mean of its divisors is an integer number (55500050009995).

Almost surely, 2^{111000100019989} is an apocalyptic number.

It is an amenable number.

111000100019989 is a deficient number, since it is larger than the sum of its proper divisors (1).

111000100019989 is an equidigital number, since it uses as much as digits as its factorization.

111000100019989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 40.

The spelling of 111000100019989 in words is "one hundred eleven trillion, one hundred million, nineteen thousand, nine hundred eighty-nine".