5218120811 has 16 divisors (see below), whose sum is σ = 5607336384. Its totient is φ = 4838206464.

The previous prime is 5218120763. The next prime is 5218120823. The reversal of 5218120811 is 1180218125.

It is a cyclic number.

It is not a de Polignac number, because 5218120811 - 2¹⁰ = 5218119787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5218120861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1354490 + ... + 1358336.

It is an arithmetic number, because the mean of its divisors is an integer number (350458524).

Almost surely, 2^5218120811 is an apocalyptic number.

5218120811 is a deficient number, since it is larger than the sum of its proper divisors (389215573).

5218120811 is a wasteful number, since it uses less digits than its factorization.

5218120811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030.

The product of its (nonzero) digits is 1280, while the sum is 29.

The square root of 5218120811 is about 72236.5614560937. The cubic root of 5218120811 is about 1734.4883077194.

Adding to 5218120811 its reverse (1180218125), we get a palindrome (6398338936).

The spelling of 5218120811 in words is "five billion, two hundred eighteen million, one hundred twenty thousand, eight hundred eleven".