5121720528211 has 12 divisors (see below), whose sum is σ = 5958225153792. Its totient is φ = 4389821168208.

The previous prime is 5121720528209. The next prime is 5121720528247. The reversal of 5121720528211 is 1128250271215.

5121720528211 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5121720528211 - 2¹ = 5121720528209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5121720528811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1709200 + ... + 3628333.

It is an arithmetic number, because the mean of its divisors is an integer number (496518762816).

Almost surely, 2^{5121720528211} is an apocalyptic number.

5121720528211 is a deficient number, since it is larger than the sum of its proper divisors (836504625581).

5121720528211 is a wasteful number, since it uses less digits than its factorization.

5121720528211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357130 (or 5357123 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 37.

Adding to 5121720528211 its reverse (1128250271215), we get a palindrome (6249970799426).

The spelling of 5121720528211 in words is "five trillion, one hundred twenty-one billion, seven hundred twenty million, five hundred twenty-eight thousand, two hundred eleven".