128102000281 has 4 divisors (see below), whose sum is σ = 129277248100. Its totient is φ = 126926752464.

The previous prime is 128102000263. The next prime is 128102000293. The reversal of 128102000281 is 182000201821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182000201821 = 39313 ⋅4629517.

It can be written as a sum of positive squares in 2 ways, for example, as 100796090256 + 27305910025 = 317484^2 + 165245^2 .

It is a cyclic number.

It is not a de Polignac number, because 128102000281 - 2¹³ = 128101992089 is a prime.

It is a super-2 number, since 2×128102000281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128102000981) 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, 587623746 + ... + 587623963.

It is an arithmetic number, because the mean of its divisors is an integer number (32319312025).

Almost surely, 2^128102000281 is an apocalyptic number.

It is an amenable number.

128102000281 is a deficient number, since it is larger than the sum of its proper divisors (1175247819).

128102000281 is a wasteful number, since it uses less digits than its factorization.

128102000281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175247818.

The product of its (nonzero) digits is 512, while the sum is 25.

The spelling of 128102000281 in words is "one hundred twenty-eight billion, one hundred two million, two hundred eighty-one", and thus it is an aban number.