12000002021209 has 4 divisors (see below), whose sum is σ = 12069366194916. Its totient is φ = 11930637847504.

The previous prime is 12000002021191. The next prime is 12000002021303. The reversal of 12000002021209 is 90212020000021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8728461633609 + 3271540387600 = 2954397^2 + 1808740^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000002021209 - 2⁵ = 12000002021177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12000002022209) 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, 34682086594 + ... + 34682086939.

It is an arithmetic number, because the mean of its divisors is an integer number (3017341548729).

Almost surely, 2^{12000002021209} is an apocalyptic number.

It is an amenable number.

12000002021209 is a deficient number, since it is larger than the sum of its proper divisors (69364173707).

12000002021209 is an equidigital number, since it uses as much as digits as its factorization.

12000002021209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69364173706.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 12000002021209 in words is "twelve trillion, two million, twenty-one thousand, two hundred nine".