22220111112221 has 16 divisors (see below), whose sum is σ = 24563672679168. Its totient is φ = 19931839992000.

The previous prime is 22220111112209. The next prime is 22220111112257. The reversal of 22220111112221 is 12221111102222.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22220111112221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22220111112193 and 22220111112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220111112271) 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, 33804341 + ... + 34455386.

It is an arithmetic number, because the mean of its divisors is an integer number (1535229542448).

Almost surely, 2^{22220111112221} is an apocalyptic number.

It is an amenable number.

22220111112221 is a deficient number, since it is larger than the sum of its proper divisors (2343561566947).

22220111112221 is a wasteful number, since it uses less digits than its factorization.

22220111112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68260132.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22220111112221 its reverse (12221111102222), we get a palindrome (34441222214443).

Subtracting from 22220111112221 its reverse (12221111102222), we obtain a palindrome (9999000009999).

The spelling of 22220111112221 in words is "twenty-two trillion, two hundred twenty billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty-one".