111111110099989 has 2 divisors, whose sum is σ = 111111110099990. Its totient is φ = 111111110099988.

The previous prime is 111111110099939. The next prime is 111111110100061. The reversal of 111111110099989 is 989990011111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78137502769764 + 32973607330225 = 8839542^2 + 5742265^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111110099989 - 2⁴³ = 102315017077781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111110099909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555555049994 + 55555555049995.

It is an arithmetic number, because the mean of its divisors is an integer number (55555555049995).

Almost surely, 2^{111111110099989} is an apocalyptic number.

It is an amenable number.

111111110099989 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111110099989 is an equidigital number, since it uses as much as digits as its factorization.

111111110099989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 52.

The spelling of 111111110099989 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred ten million, ninety-nine thousand, nine hundred eighty-nine".