12021202309 has 2 divisors, whose sum is σ = 12021202310. Its totient is φ = 12021202308.

The previous prime is 12021202301. The next prime is 12021202381. The reversal of 12021202309 is 90320212021.

12021202309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10089599809 + 1931602500 = 100447^2 + 43950^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021202309 - 2³ = 12021202301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021202309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021202301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010601154 + 6010601155.

It is an arithmetic number, because the mean of its divisors is an integer number (6010601155).

Almost surely, 2^12021202309 is an apocalyptic number.

It is an amenable number.

12021202309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021202309 is an equidigital number, since it uses as much as digits as its factorization.

12021202309 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 spelling of 12021202309 in words is "twelve billion, twenty-one million, two hundred two thousand, three hundred nine".