22220222212221 has 48 divisors (see below), whose sum is σ = 32915233552320. Its totient is φ = 13322264032000.

The previous prime is 22220222212213. The next prime is 22220222212241. The reversal of 22220222212221 is 12221222202222.

It is not a de Polignac number, because 22220222212221 - 2³ = 22220222212213 is a prime.

It is a super-2 number, since 2×22220222212221² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22220222212191 and 22220222212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220222212241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43484950 + ... + 43992968.

It is an arithmetic number, because the mean of its divisors is an integer number (685734032340).

Almost surely, 2^{22220222212221} is an apocalyptic number.

It is an amenable number.

22220222212221 is a deficient number, since it is larger than the sum of its proper divisors (10695011340099).

22220222212221 is a wasteful number, since it uses less digits than its factorization.

22220222212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509338 (or 509327 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 22220222212221 its reverse (12221222202222), we get a palindrome (34441444414443).

Subtracting from 22220222212221 its reverse (12221222202222), we obtain a palindrome (9999000009999).

The spelling of 22220222212221 in words is "twenty-two trillion, two hundred twenty billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".