6128111281 has 2 divisors, whose sum is σ = 6128111282. Its totient is φ = 6128111280.

The previous prime is 6128111239. The next prime is 6128111299. The reversal of 6128111281 is 1821118216.

6128111281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6059221281 + 68890000 = 77841^2 + 8300^2 .

It is a cyclic number.

It is not a de Polignac number, because 6128111281 - 2²⁷ = 5993893553 is a prime.

It is a super-2 number, since 2×6128111281² = 75107495744638921922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6128111201) 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, 3064055640 + 3064055641.

It is an arithmetic number, because the mean of its divisors is an integer number (3064055641).

Almost surely, 2^6128111281 is an apocalyptic number.

It is an amenable number.

6128111281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6128111281 is an equidigital number, since it uses as much as digits as its factorization.

6128111281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 31.

The square root of 6128111281 is about 78282.2539340814. The cubic root of 6128111281 is about 1829.9626019809.

Adding to 6128111281 its reverse (1821118216), we get a palindrome (7949229497).

The spelling of 6128111281 in words is "six billion, one hundred twenty-eight million, one hundred eleven thousand, two hundred eighty-one".