22112221112221 has 4 divisors (see below), whose sum is σ = 22157626084192. Its totient is φ = 22066816140252.

The previous prime is 22112221112203. The next prime is 22112221112323. The reversal of 22112221112221 is 12221112221122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22112221112221 - 2⁹ = 22112221111709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22112221112192 and 22112221112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112221112521) 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 3 ways as a sum of consecutive naturals, for example, 22702485255 + ... + 22702486228.

It is an arithmetic number, because the mean of its divisors is an integer number (5539406521048).

Almost surely, 2^{22112221112221} is an apocalyptic number.

It is an amenable number.

22112221112221 is a deficient number, since it is larger than the sum of its proper divisors (45404971971).

22112221112221 is an equidigital number, since it uses as much as digits as its factorization.

22112221112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45404971970.

The product of its digits is 256, while the sum is 22.

Adding to 22112221112221 its reverse (12221112221122), we get a palindrome (34333333333343).

The spelling of 22112221112221 in words is "twenty-two trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".