128111103 has 6 divisors (see below), whose sum is σ = 185049384. Its totient is φ = 85407396.

The previous prime is 128111083. The next prime is 128111111. The reversal of 128111103 is 301111821.

It is a happy number.

It is not a de Polignac number, because 128111103 - 2⁸ = 128110847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128111803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7117275 + ... + 7117292.

It is an arithmetic number, because the mean of its divisors is an integer number (30841564).

Almost surely, 2^128111103 is an apocalyptic number.

128111103 is a deficient number, since it is larger than the sum of its proper divisors (56938281).

128111103 is a wasteful number, since it uses less digits than its factorization.

128111103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14234573 (or 14234570 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 128111103 is about 11318.6175392581. The cubic root of 128111103 is about 504.1141913404.

Adding to 128111103 its reverse (301111821), we get a palindrome (429222924).

The spelling of 128111103 in words is "one hundred twenty-eight million, one hundred eleven thousand, one hundred three".