5278510121 has 2 divisors, whose sum is σ = 5278510122. Its totient is φ = 5278510120.

The previous prime is 5278510093. The next prime is 5278510129. The reversal of 5278510121 is 1210158725.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3576040000 + 1702470121 = 59800^2 + 41261^2 .

It is a cyclic number.

It is not a de Polignac number, because 5278510121 - 2¹⁸ = 5278247977 is a prime.

It is not a weakly prime, because it can be changed into another prime (5278510129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639255060 + 2639255061.

It is an arithmetic number, because the mean of its divisors is an integer number (2639255061).

Almost surely, 2^5278510121 is an apocalyptic number.

It is an amenable number.

5278510121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5278510121 is an equidigital number, since it uses as much as digits as its factorization.

5278510121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 32.

The square root of 5278510121 is about 72653.3558825743. The cubic root of 5278510121 is about 1741.1537379512.

Adding to 5278510121 its reverse (1210158725), we get a palindrome (6488668846).

The spelling of 5278510121 in words is "five billion, two hundred seventy-eight million, five hundred ten thousand, one hundred twenty-one".