128130265171 has 4 divisors (see below), whose sum is σ = 129374248432. Its totient is φ = 126886281912.

The previous prime is 128130265117. The next prime is 128130265213. The reversal of 128130265171 is 171562031821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128130265171 - 2²⁹ = 127593394259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128130265171.

It is not an unprimeable number, because it can be changed into a prime (128130265771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621991476 + ... + 621991681.

It is an arithmetic number, because the mean of its divisors is an integer number (32343562108).

Almost surely, 2^128130265171 is an apocalyptic number.

128130265171 is a deficient number, since it is larger than the sum of its proper divisors (1243983261).

128130265171 is a wasteful number, since it uses less digits than its factorization.

128130265171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243983260.

The product of its (nonzero) digits is 20160, while the sum is 37.

Adding to 128130265171 its reverse (171562031821), we get a palindrome (299692296992).

The spelling of 128130265171 in words is "one hundred twenty-eight billion, one hundred thirty million, two hundred sixty-five thousand, one hundred seventy-one".