2212020809 has 2 divisors, whose sum is σ = 2212020810. Its totient is φ = 2212020808.

The previous prime is 2212020757. The next prime is 2212020817. The reversal of 2212020809 is 9080202122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1313700025 + 898320784 = 36245^2 + 29972^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212020809 - 2¹² = 2212016713 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 (2212020829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106010404 + 1106010405.

It is an arithmetic number, because the mean of its divisors is an integer number (1106010405).

Almost surely, 2^2212020809 is an apocalyptic number.

It is an amenable number.

2212020809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212020809 is an equidigital number, since it uses as much as digits as its factorization.

2212020809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2212020809 is about 47032.1252868717. The cubic root of 2212020809 is about 1302.9559578291.

The spelling of 2212020809 in words is "two billion, two hundred twelve million, twenty thousand, eight hundred nine".