12011013021209 has 4 divisors (see below), whose sum is σ = 12011087442816. Its totient is φ = 12010938599604.

The previous prime is 12011013021181. The next prime is 12011013021253. The reversal of 12011013021209 is 90212031011021.

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 a de Polignac number, because none of the positive numbers 2^k-12011013021209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011013621209) 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 in 3 ways as a sum of consecutive naturals, for example, 36968189 + ... + 37291674.

It is an arithmetic number, because the mean of its divisors is an integer number (3002771860704).

Almost surely, 2^{12011013021209} is an apocalyptic number.

It is an amenable number.

12011013021209 is a deficient number, since it is larger than the sum of its proper divisors (74421607).

12011013021209 is an equidigital number, since it uses as much as digits as its factorization.

12011013021209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74421606.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 12011013021209 in words is "twelve trillion, eleven billion, thirteen million, twenty-one thousand, two hundred nine".