128442011 has 2 divisors, whose sum is σ = 128442012. Its totient is φ = 128442010.

The previous prime is 128442007. The next prime is 128442029. The reversal of 128442011 is 110244821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128442011 - 2² = 128442007 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128442031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64221005 + 64221006.

It is an arithmetic number, because the mean of its divisors is an integer number (64221006).

Almost surely, 2^128442011 is an apocalyptic number.

128442011 is a deficient number, since it is larger than the sum of its proper divisors (1).

128442011 is an equidigital number, since it uses as much as digits as its factorization.

128442011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 128442011 is about 11333.2259749817. The cubic root of 128442011 is about 504.5478565832.

Adding to 128442011 its reverse (110244821), we get a palindrome (238686832).

The spelling of 128442011 in words is "one hundred twenty-eight million, four hundred forty-two thousand, eleven".