22220211212221 has 16 divisors (see below), whose sum is σ = 24337494612288. Its totient is φ = 20119203529600.

The previous prime is 22220211212123. The next prime is 22220211212233. The reversal of 22220211212221 is 12221211202222.

It is a cyclic number.

It is not a de Polignac number, because 22220211212221 - 2⁷ = 22220211212093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22220211212192 and 22220211212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220211212281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5216190 + ... + 8464576.

It is an arithmetic number, because the mean of its divisors is an integer number (1521093413268).

Almost surely, 2^{22220211212221} is an apocalyptic number.

It is an amenable number.

22220211212221 is a deficient number, since it is larger than the sum of its proper divisors (2117283400067).

22220211212221 is a wasteful number, since it uses less digits than its factorization.

22220211212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250892.

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

Adding to 22220211212221 its reverse (12221211202222), we get a palindrome (34441422414443).

Subtracting from 22220211212221 its reverse (12221211202222), we obtain a palindrome (9999000009999).

The spelling of 22220211212221 in words is "twenty-two trillion, two hundred twenty billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-one".