22020212221 has 8 divisors (see below), whose sum is σ = 25168921344. Its totient is φ = 18872244240.

The previous prime is 22020212173. The next prime is 22020212233. The reversal of 22020212221 is 12221202022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22020212221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22020212195 and 22020212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020212821) 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, 120085 + ... + 241786.

It is an arithmetic number, because the mean of its divisors is an integer number (3146115168).

Almost surely, 2^22020212221 is an apocalyptic number.

It is an amenable number.

22020212221 is a deficient number, since it is larger than the sum of its proper divisors (3148709123).

22020212221 is an equidigital number, since it uses as much as digits as its factorization.

22020212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370571.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22020212221 its reverse (12221202022), we get a palindrome (34241414243).

The spelling of 22020212221 in words is "twenty-two billion, twenty million, two hundred twelve thousand, two hundred twenty-one".