128189085122 has 54 divisors (see below), whose sum is σ = 227904046713. Its totient is φ = 53918920944.

The previous prime is 128189085119. The next prime is 128189085127. The reversal of 128189085122 is 221580981821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71401718521 + 56787366601 = 267211^2 + 238301^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=253169.

It is not an unprimeable number, because it can be changed into a prime (128189085127) 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 in 26 ways as a sum of consecutive naturals, for example, 209117288 + ... + 209117900.

Almost surely, 2^128189085122 is an apocalyptic number.

128189085122 is a deficient number, since it is larger than the sum of its proper divisors (99714961591).

128189085122 is an frugal number, since it uses more digits than its factorization.

128189085122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 47.

The spelling of 128189085122 in words is "one hundred twenty-eight billion, one hundred eighty-nine million, eighty-five thousand, one hundred twenty-two".