12022001221 has 8 divisors (see below), whose sum is σ = 12438481664. Its totient is φ = 11607312960.

The previous prime is 12022001219. The next prime is 12022001227. The reversal of 12022001221 is 12210022021.

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 12022001221 - 2¹ = 12022001219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022001227) 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, 434391 + ... + 461236.

It is an arithmetic number, because the mean of its divisors is an integer number (1554810208).

Almost surely, 2^12022001221 is an apocalyptic number.

It is an amenable number.

12022001221 is a deficient number, since it is larger than the sum of its proper divisors (416480443).

12022001221 is an equidigital number, since it uses as much as digits as its factorization.

12022001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896091.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12022001221 its reverse (12210022021), we get a palindrome (24232023242).

The spelling of 12022001221 in words is "twelve billion, twenty-two million, one thousand, two hundred twenty-one".