12221209999 has 4 divisors (see below), whose sum is σ = 12237484000. Its totient is φ = 12204936000.

The previous prime is 12221209997. The next prime is 12221210009. The reversal of 12221209999 is 99990212221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99990212221 = 27689 ⋅3611189.

It is a cyclic number.

It is not a de Polignac number, because 12221209999 - 2¹ = 12221209997 is a prime.

It is a super-3 number, since 3×12221209999³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221209993) 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, 8135874 + ... + 8137375.

It is an arithmetic number, because the mean of its divisors is an integer number (3059371000).

Almost surely, 2^12221209999 is an apocalyptic number.

12221209999 is a deficient number, since it is larger than the sum of its proper divisors (16274001).

12221209999 is an equidigital number, since it uses as much as digits as its factorization.

12221209999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16274000.

The product of its (nonzero) digits is 104976, while the sum is 46.

The spelling of 12221209999 in words is "twelve billion, two hundred twenty-one million, two hundred nine thousand, nine hundred ninety-nine".