2120862209 has 2 divisors, whose sum is σ = 2120862210. Its totient is φ = 2120862208.

The previous prime is 2120862199. The next prime is 2120862221. The reversal of 2120862209 is 9022680212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1816464400 + 304397809 = 42620^2 + 17447^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120862209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2120862259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060431104 + 1060431105.

It is an arithmetic number, because the mean of its divisors is an integer number (1060431105).

Almost surely, 2^2120862209 is an apocalyptic number.

It is an amenable number.

2120862209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120862209 is an equidigital number, since it uses as much as digits as its factorization.

2120862209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 2120862209 is about 46052.8197725177. The cubic root of 2120862209 is about 1284.8057883498.

The spelling of 2120862209 in words is "two billion, one hundred twenty million, eight hundred sixty-two thousand, two hundred nine".