20012201021209 has 2 divisors, whose sum is σ = 20012201021210. Its totient is φ = 20012201021208.

The previous prime is 20012201021201. The next prime is 20012201021249. The reversal of 20012201021209 is 90212010221002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14673458054025 + 5338742967184 = 3830595^2 + 2310572^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012201021209 - 2³ = 20012201021201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012201021209.

It is not a weakly prime, because it can be changed into another prime (20012201021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006100510604 + 10006100510605.

It is an arithmetic number, because the mean of its divisors is an integer number (10006100510605).

Almost surely, 2^{20012201021209} is an apocalyptic number.

It is an amenable number.

20012201021209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012201021209 is an equidigital number, since it uses as much as digits as its factorization.

20012201021209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 20012201021209 in words is "twenty trillion, twelve billion, two hundred one million, twenty-one thousand, two hundred nine".