12022020221 has 4 divisors (see below), whose sum is σ = 12022244832. Its totient is φ = 12021795612.

The previous prime is 12022020187. The next prime is 12022020247. The reversal of 12022020221 is 12202022021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12022020221 - 2²² = 12017825917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12022020196 and 12022020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022020251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19706 + ... + 156308.

It is an arithmetic number, because the mean of its divisors is an integer number (3005561208).

Almost surely, 2^12022020221 is an apocalyptic number.

It is an amenable number.

12022020221 is a deficient number, since it is larger than the sum of its proper divisors (224611).

12022020221 is an equidigital number, since it uses as much as digits as its factorization.

12022020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224610.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12022020221 its reverse (12202022021), we get a palindrome (24224042242).

The spelling of 12022020221 in words is "twelve billion, twenty-two million, twenty thousand, two hundred twenty-one".