128003111 has 2 divisors, whose sum is σ = 128003112. Its totient is φ = 128003110.

The previous prime is 128003101. The next prime is 128003167. The reversal of 128003111 is 111300821.

It is a weak prime.

It is an emirp because it is prime and its reverse (111300821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128003111 - 2¹⁰ = 128002087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128003111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128003101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64001555 + 64001556.

It is an arithmetic number, because the mean of its divisors is an integer number (64001556).

Almost surely, 2^128003111 is an apocalyptic number.

128003111 is a deficient number, since it is larger than the sum of its proper divisors (1).

128003111 is an equidigital number, since it uses as much as digits as its factorization.

128003111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 128003111 is about 11313.8459862241. The cubic root of 128003111 is about 503.9725028565.

Adding to 128003111 its reverse (111300821), we get a palindrome (239303932).

The spelling of 128003111 in words is "one hundred twenty-eight million, three thousand, one hundred eleven".