2128801247 has 2 divisors, whose sum is σ = 2128801248. Its totient is φ = 2128801246.

The previous prime is 2128801223. The next prime is 2128801261. The reversal of 2128801247 is 7421088212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2128801247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128806247) 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 as a sum of consecutive naturals, namely, 1064400623 + 1064400624.

It is an arithmetic number, because the mean of its divisors is an integer number (1064400624).

Almost surely, 2^2128801247 is an apocalyptic number.

2128801247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128801247 is an equidigital number, since it uses as much as digits as its factorization.

2128801247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 2128801247 is about 46138.9341771134. The cubic root of 2128801247 is about 1286.4069329126.

Adding to 2128801247 its reverse (7421088212), we get a palindrome (9549889459).

The spelling of 2128801247 in words is "two billion, one hundred twenty-eight million, eight hundred one thousand, two hundred forty-seven".