128126331071 has 8 divisors (see below), whose sum is σ = 135349791600. Its totient is φ = 120950867520.

The previous prime is 128126331037. The next prime is 128126331083. The reversal of 128126331071 is 170133621821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128126331071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128126331001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11993756 + ... + 12004433.

It is an arithmetic number, because the mean of its divisors is an integer number (16918723950).

Almost surely, 2^128126331071 is an apocalyptic number.

128126331071 is a deficient number, since it is larger than the sum of its proper divisors (7223460529).

128126331071 is a wasteful number, since it uses less digits than its factorization.

128126331071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23998489.

The product of its (nonzero) digits is 12096, while the sum is 35.

Adding to 128126331071 its reverse (170133621821), we get a palindrome (298259952892).

The spelling of 128126331071 in words is "one hundred twenty-eight billion, one hundred twenty-six million, three hundred thirty-one thousand, seventy-one".