22020221 has 8 divisors (see below), whose sum is σ = 23241600. Its totient is φ = 20805120.

The previous prime is 22020211. The next prime is 22020227. The reversal of 22020221 is 12202022.

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 22020221 - 2¹⁰ = 22019197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020227) 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, 6845 + ... + 9533.

It is an arithmetic number, because the mean of its divisors is an integer number (2905200).

Almost surely, 2^22020221 is an apocalyptic number.

It is an amenable number.

22020221 is a deficient number, since it is larger than the sum of its proper divisors (1221379).

22020221 is a wasteful number, since it uses less digits than its factorization.

22020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22020221 is about 4692.5708305789. The cubic root of 22020221 is about 280.2897553182.

Adding to 22020221 its reverse (12202022), we get a palindrome (34222243).

The spelling of 22020221 in words is "twenty-two million, twenty thousand, two hundred twenty-one".