111355689989 has 2 divisors, whose sum is σ = 111355689990. Its totient is φ = 111355689988.

The previous prime is 111355689979. The next prime is 111355690001. The reversal of 111355689989 is 989986553111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98381340964 + 12974349025 = 313658^2 + 113905^2 .

It is an emirp because it is prime and its reverse (989986553111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111355689989 - 2¹² = 111355685893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111355689979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55677844994 + 55677844995.

It is an arithmetic number, because the mean of its divisors is an integer number (55677844995).

Almost surely, 2^111355689989 is an apocalyptic number.

It is an amenable number.

111355689989 is a deficient number, since it is larger than the sum of its proper divisors (1).

111355689989 is an equidigital number, since it uses as much as digits as its factorization.

111355689989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20995200, while the sum is 65.

The spelling of 111355689989 in words is "one hundred eleven billion, three hundred fifty-five million, six hundred eighty-nine thousand, nine hundred eighty-nine".