128213729271 has 12 divisors (see below), whose sum is σ = 185270468448. Its totient is φ = 85442192064.

The previous prime is 128213729201. The next prime is 128213729311. The reversal of 128213729271 is 172927312821.

128213729271 is a `hidden beast` number, since 1 + 2 + 8 + 2 + 1 + 372 + 9 + 271 = 666.

It is not a de Polignac number, because 128213729271 - 2¹¹ = 128213727223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128213729201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2778130 + ... + 2823903.

It is an arithmetic number, because the mean of its divisors is an integer number (15439205704).

Almost surely, 2^128213729271 is an apocalyptic number.

128213729271 is a deficient number, since it is larger than the sum of its proper divisors (57056739177).

128213729271 is a wasteful number, since it uses less digits than its factorization.

128213729271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604582 (or 5604579 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The spelling of 128213729271 in words is "one hundred twenty-eight billion, two hundred thirteen million, seven hundred twenty-nine thousand, two hundred seventy-one".