5216758121 has 2 divisors, whose sum is σ = 5216758122. Its totient is φ = 5216758120.

The previous prime is 5216758097. The next prime is 5216758181. The reversal of 5216758121 is 1218576125.

5216758121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5032341721 + 184416400 = 70939^2 + 13580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5216758121 is a prime.

It is not a weakly prime, because it can be changed into another prime (5216758181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608379060 + 2608379061.

It is an arithmetic number, because the mean of its divisors is an integer number (2608379061).

Almost surely, 2^5216758121 is an apocalyptic number.

It is an amenable number.

5216758121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5216758121 is an equidigital number, since it uses as much as digits as its factorization.

5216758121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 38.

The square root of 5216758121 is about 72227.1287052171. The cubic root of 5216758121 is about 1734.3373098326.

The spelling of 5216758121 in words is "five billion, two hundred sixteen million, seven hundred fifty-eight thousand, one hundred twenty-one".