128211089 has 2 divisors, whose sum is σ = 128211090. Its totient is φ = 128211088.

The previous prime is 128211053. The next prime is 128211091. The reversal of 128211089 is 980112821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 30991489 = 9860^2 + 5567^2 .

It is a cyclic number.

It is not a de Polignac number, because 128211089 - 2²⁰ = 127162513 is a prime.

Together with 128211091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128211289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64105544 + 64105545.

It is an arithmetic number, because the mean of its divisors is an integer number (64105545).

Almost surely, 2^128211089 is an apocalyptic number.

It is an amenable number.

128211089 is a deficient number, since it is larger than the sum of its proper divisors (1).

128211089 is an equidigital number, since it uses as much as digits as its factorization.

128211089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 128211089 is about 11323.0335599609. The cubic root of 128211089 is about 504.2453047597.

The spelling of 128211089 in words is "one hundred twenty-eight million, two hundred eleven thousand, eighty-nine".