111355689871 has 2 divisors, whose sum is σ = 111355689872. Its totient is φ = 111355689870.

The previous prime is 111355689829. The next prime is 111355689911. The reversal of 111355689871 is 178986553111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111355689871 - 2²⁵ = 111322135439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111355689371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55677844935 + 55677844936.

It is an arithmetic number, because the mean of its divisors is an integer number (55677844936).

Almost surely, 2^111355689871 is an apocalyptic number.

111355689871 is a deficient number, since it is larger than the sum of its proper divisors (1).

111355689871 is an equidigital number, since it uses as much as digits as its factorization.

111355689871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 55.

The spelling of 111355689871 in words is "one hundred eleven billion, three hundred fifty-five million, six hundred eighty-nine thousand, eight hundred seventy-one".