22220221211221 has 8 divisors (see below), whose sum is σ = 24252992654688. Its totient is φ = 20189574990000.

The previous prime is 22220221211189. The next prime is 22220221211239. The reversal of 22220221211221 is 12211212202222.

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 22220221211221 - 2⁵ = 22220221211189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22220221211192 and 22220221211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220221211291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531283695 + ... + 531325516.

It is an arithmetic number, because the mean of its divisors is an integer number (3031624081836).

Almost surely, 2^{22220221211221} is an apocalyptic number.

It is an amenable number.

22220221211221 is a deficient number, since it is larger than the sum of its proper divisors (2032771443467).

22220221211221 is a wasteful number, since it uses less digits than its factorization.

22220221211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062611123.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22220221211221 its reverse (12211212202222), we get a palindrome (34431433413443).

The spelling of 22220221211221 in words is "twenty-two trillion, two hundred twenty billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".