22022312221 has 8 divisors (see below), whose sum is σ = 27104384384. Its totient is φ = 17424246960.

The previous prime is 22022312203. The next prime is 22022312243. The reversal of 22022312221 is 12221322022.

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 22022312221 - 2²⁵ = 21988757789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022312201) 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, 121001625 + ... + 121001806.

It is an arithmetic number, because the mean of its divisors is an integer number (3388048048).

Almost surely, 2^22022312221 is an apocalyptic number.

It is an amenable number.

22022312221 is a deficient number, since it is larger than the sum of its proper divisors (5082072163).

22022312221 is a wasteful number, since it uses less digits than its factorization.

22022312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242003451.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22022312221 its reverse (12221322022), we get a palindrome (34243634243).

The spelling of 22022312221 in words is "twenty-two billion, twenty-two million, three hundred twelve thousand, two hundred twenty-one".