5120105209 has 2 divisors, whose sum is σ = 5120105210. Its totient is φ = 5120105208.

The previous prime is 5120105197. The next prime is 5120105213. The reversal of 5120105209 is 9025010215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4496104809 + 624000400 = 67053^2 + 24980^2 .

It is a cyclic number.

It is not a de Polignac number, because 5120105209 - 2²⁷ = 4985887481 is a prime.

It is not a weakly prime, because it can be changed into another prime (5120105219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560052604 + 2560052605.

It is an arithmetic number, because the mean of its divisors is an integer number (2560052605).

Almost surely, 2^5120105209 is an apocalyptic number.

It is an amenable number.

5120105209 is a deficient number, since it is larger than the sum of its proper divisors (1).

5120105209 is an equidigital number, since it uses as much as digits as its factorization.

5120105209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 5120105209 is about 71554.9104464536. The cubic root of 5120105209 is about 1723.5595574613.

The spelling of 5120105209 in words is "five billion, one hundred twenty million, one hundred five thousand, two hundred nine".