12001233221 has 8 divisors (see below), whose sum is σ = 12314554560. Its totient is φ = 11689467552.

The previous prime is 12001233151. The next prime is 12001233229. The reversal of 12001233221 is 12233210021.

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 12001233221 - 2²² = 11997038917 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 12001233221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001233229) 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, 373280 + ... + 404153.

It is an arithmetic number, because the mean of its divisors is an integer number (1539319320).

Almost surely, 2^12001233221 is an apocalyptic number.

It is an amenable number.

12001233221 is a deficient number, since it is larger than the sum of its proper divisors (313321339).

12001233221 is an equidigital number, since it uses as much as digits as its factorization.

12001233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777835.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12001233221 its reverse (12233210021), we get a palindrome (24234443242).

The spelling of 12001233221 in words is "twelve billion, one million, two hundred thirty-three thousand, two hundred twenty-one".