113128271 has 2 divisors, whose sum is σ = 113128272. Its totient is φ = 113128270.

The previous prime is 113128259. The next prime is 113128273. The reversal of 113128271 is 172821311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113128271 is a prime.

Together with 113128273, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113128271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113128273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56564135 + 56564136.

It is an arithmetic number, because the mean of its divisors is an integer number (56564136).

Almost surely, 2^113128271 is an apocalyptic number.

113128271 is a deficient number, since it is larger than the sum of its proper divisors (1).

113128271 is an equidigital number, since it uses as much as digits as its factorization.

113128271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 26.

The square root of 113128271 is about 10636.1774618516. The cubic root of 113128271 is about 483.6416749394.

Adding to 113128271 its reverse (172821311), we get a palindrome (285949582).

The spelling of 113128271 in words is "one hundred thirteen million, one hundred twenty-eight thousand, two hundred seventy-one".