128018711 has 2 divisors, whose sum is σ = 128018712. Its totient is φ = 128018710.

The previous prime is 128018699. The next prime is 128018749. The reversal of 128018711 is 117810821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128018711 - 2¹⁸ = 127756567 is a prime.

It is a super-2 number, since 2×128018711² = 32777580732203042, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128008711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64009355 + 64009356.

It is an arithmetic number, because the mean of its divisors is an integer number (64009356).

Almost surely, 2^128018711 is an apocalyptic number.

128018711 is a deficient number, since it is larger than the sum of its proper divisors (1).

128018711 is an equidigital number, since it uses as much as digits as its factorization.

128018711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 29.

The square root of 128018711 is about 11314.5353859538. The cubic root of 128018711 is about 503.9929754102.

It can be divided in two parts, 12801 and 8711, that added together give a palindrome (21512).

The spelling of 128018711 in words is "one hundred twenty-eight million, eighteen thousand, seven hundred eleven".