128320011 has 16 divisors (see below), whose sum is σ = 194150400. Its totient is φ = 83725704.

The previous prime is 128320001. The next prime is 128320019. The reversal of 128320011 is 110023821.

It is not a de Polignac number, because 128320011 - 2⁵ = 128319979 is a prime.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (128320019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49291 + ... + 51828.

It is an arithmetic number, because the mean of its divisors is an integer number (12134400).

Almost surely, 2^128320011 is an apocalyptic number.

128320011 is a deficient number, since it is larger than the sum of its proper divisors (65830389).

128320011 is a wasteful number, since it uses less digits than its factorization.

128320011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101175 (or 101169 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 128320011 is about 11327.8422923344. The cubic root of 128320011 is about 504.3880585610.

Adding to 128320011 its reverse (110023821), we get a palindrome (238343832).

The spelling of 128320011 in words is "one hundred twenty-eight million, three hundred twenty thousand, eleven".