2120616217 has 2 divisors, whose sum is σ = 2120616218. Its totient is φ = 2120616216.

The previous prime is 2120616209. The next prime is 2120616229. The reversal of 2120616217 is 7126160212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2042045721 + 78570496 = 45189^2 + 8864^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120616217 - 2³ = 2120616209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120616517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060308108 + 1060308109.

It is an arithmetic number, because the mean of its divisors is an integer number (1060308109).

Almost surely, 2^2120616217 is an apocalyptic number.

It is an amenable number.

2120616217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120616217 is an equidigital number, since it uses as much as digits as its factorization.

2120616217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2120616217 is about 46050.1489356984. The cubic root of 2120616217 is about 1284.7561129294.

Adding to 2120616217 its reverse (7126160212), we get a palindrome (9246776429).

The spelling of 2120616217 in words is "two billion, one hundred twenty million, six hundred sixteen thousand, two hundred seventeen".