128211 has 4 divisors (see below), whose sum is σ = 170952. Its totient is φ = 85472.

The previous prime is 128203. The next prime is 128213. The reversal of 128211 is 112821.

128211 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112821 = 3 ⋅37607.

It is a cyclic number.

It is not a de Polignac number, because 128211 - 2³ = 128203 is a prime.

It is an Ulam number.

It is a D-number.

128211 is strictly pandigital in base 7.

It is not an unprimeable number, because it can be changed into a prime (128213) 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 3 ways as a sum of consecutive naturals, for example, 21366 + ... + 21371.

It is an arithmetic number, because the mean of its divisors is an integer number (42738).

2¹²⁸²¹¹ is an apocalyptic number.

128211 is a deficient number, since it is larger than the sum of its proper divisors (42741).

128211 is an equidigital number, since it uses as much as digits as its factorization.

128211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42740.

The product of its digits is 32, while the sum is 15.

The square root of 128211 is about 358.0656364411. The cubic root of 128211 is about 50.4245188083.

The spelling of 128211 in words is "one hundred twenty-eight thousand, two hundred eleven".