22212302221 has 8 divisors (see below), whose sum is σ = 23520591864.
Its totient is φ = 20904199680.
The previous prime is 22212302219. The next prime is 22212302227. The reversal of 22212302221 is 12220321222.
It can be written as a sum of positive squares in 4 ways, for example, as 675272196 + 21537030025 = 25986^2 + 146755^2
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 22212302221 - 21 = 22212302219 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 (22212302227) 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, 252361 + ... + 328801.
It is an arithmetic number, because the mean of its divisors is an integer number (2940073983).
Almost surely, 222212302221 is an apocalyptic number.
It is an amenable number.
22212302221 is a deficient number, since it is larger than the sum of its proper divisors (1308289643).
22212302221 is a wasteful number, since it uses less digits than its factorization.
22212302221 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 93551.
The product of its (nonzero) digits is 384, while the sum is 19.
Adding to 22212302221 its reverse (12220321222), we get a palindrome (34432623443).
The spelling of 22212302221 in words is "twenty-two billion, two hundred twelve million, three hundred two thousand, two hundred twenty-one".