2212021309 has 2 divisors, whose sum is σ = 2212021310. Its totient is φ = 2212021308.

The previous prime is 2212021307. The next prime is 2212021321. The reversal of 2212021309 is 9031202122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1262025625 + 949995684 = 35525^2 + 30822^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212021309 - 2¹ = 2212021307 is a prime.

Together with 2212021307, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2212021309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2212021307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106010654 + 1106010655.

It is an arithmetic number, because the mean of its divisors is an integer number (1106010655).

Almost surely, 2^2212021309 is an apocalyptic number.

It is an amenable number.

2212021309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212021309 is an equidigital number, since it uses as much as digits as its factorization.

2212021309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2212021309 is about 47032.1306023871. The cubic root of 2212021309 is about 1302.9560560015.

The spelling of 2212021309 in words is "two billion, two hundred twelve million, twenty-one thousand, three hundred nine".