2128811277 has 16 divisors (see below), whose sum is σ = 2906309120. Its totient is φ = 1385303472.

The previous prime is 2128811263. The next prime is 2128811351. The reversal of 2128811277 is 7721188212.

It is not a de Polignac number, because 2128811277 - 2¹⁶ = 2128745741 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 (2128811227) 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 in 15 ways as a sum of consecutive naturals, for example, 236424 + ... + 245262.

It is an arithmetic number, because the mean of its divisors is an integer number (181644320).

Almost surely, 2^2128811277 is an apocalyptic number.

It is an amenable number.

2128811277 is a deficient number, since it is larger than the sum of its proper divisors (777497843).

2128811277 is a wasteful number, since it uses less digits than its factorization.

2128811277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10752.

The product of its digits is 25088, while the sum is 39.

The square root of 2128811277 is about 46139.0428704367. The cubic root of 2128811277 is about 1286.4089532423.

Adding to 2128811277 its reverse (7721188212), we get a palindrome (9849999489).

The spelling of 2128811277 in words is "two billion, one hundred twenty-eight million, eight hundred eleven thousand, two hundred seventy-seven".