22022021221 has 8 divisors (see below), whose sum is σ = 23813550720. Its totient is φ = 20285615808.

The previous prime is 22022021191. The next prime is 22022021261. The reversal of 22022021221 is 12212022022.

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 22022021221 - 2⁷ = 22022021093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22022021195 and 22022021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022021261) 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, 13780191 + ... + 13781788.

It is an arithmetic number, because the mean of its divisors is an integer number (2976693840).

Almost surely, 2^22022021221 is an apocalyptic number.

It is an amenable number.

22022021221 is a deficient number, since it is larger than the sum of its proper divisors (1791529499).

22022021221 is a wasteful number, since it uses less digits than its factorization.

22022021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27562043.

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

Adding to 22022021221 its reverse (12212022022), we get a palindrome (34234043243).

The spelling of 22022021221 in words is "twenty-two billion, twenty-two million, twenty-one thousand, two hundred twenty-one".