22011113221 has 4 divisors (see below), whose sum is σ = 22238032012. Its totient is φ = 21784194432.

The previous prime is 22011113213. The next prime is 22011113251. The reversal of 22011113221 is 12231111022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13931080900 + 8080032321 = 118030^2 + 89889^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011113221 - 2³ = 22011113213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011113195 and 22011113204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011113251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113459250 + ... + 113459443.

It is an arithmetic number, because the mean of its divisors is an integer number (5559508003).

Almost surely, 2^22011113221 is an apocalyptic number.

It is an amenable number.

22011113221 is a deficient number, since it is larger than the sum of its proper divisors (226918791).

22011113221 is an equidigital number, since it uses as much as digits as its factorization.

22011113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226918790.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 22011113221 its reverse (12231111022), we get a palindrome (34242224243).

It can be divided in two parts, 220111 and 13221, that added together give a palindrome (233332).

The spelling of 22011113221 in words is "twenty-two billion, eleven million, one hundred thirteen thousand, two hundred twenty-one".