12021222009 has 8 divisors (see below), whose sum is σ = 16033578912. Its totient is φ = 8011506560.

The previous prime is 12021221999. The next prime is 12021222023. The reversal of 12021222009 is 90022212021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12021222009 - 2⁸ = 12021221753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021222809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649719 + ... + 667964.

It is an arithmetic number, because the mean of its divisors is an integer number (2004197364).

Almost surely, 2^12021222009 is an apocalyptic number.

It is an amenable number.

12021222009 is a deficient number, since it is larger than the sum of its proper divisors (4012356903).

12021222009 is a wasteful number, since it uses less digits than its factorization.

12021222009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320727.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 12021222009 in words is "twelve billion, twenty-one million, two hundred twenty-two thousand, nine".