12001212020209 has 4 divisors (see below), whose sum is σ = 12001349718640. Its totient is φ = 12001074321780.

The previous prime is 12001212020197. The next prime is 12001212020269. The reversal of 12001212020209 is 90202021210021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12001212020209 - 2¹¹ = 12001212018161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12001212020209.

It is not an unprimeable number, because it can be changed into a prime (12001212020269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68718399 + ... + 68892820.

It is an arithmetic number, because the mean of its divisors is an integer number (3000337429660).

Almost surely, 2^{12001212020209} is an apocalyptic number.

It is an amenable number.

12001212020209 is a deficient number, since it is larger than the sum of its proper divisors (137698431).

12001212020209 is an equidigital number, since it uses as much as digits as its factorization.

12001212020209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137698430.

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

The spelling of 12001212020209 in words is "twelve trillion, one billion, two hundred twelve million, twenty thousand, two hundred nine".