11222121113221 has 4 divisors (see below), whose sum is σ = 11279086195212. Its totient is φ = 11165156031232.

The previous prime is 11222121113167. The next prime is 11222121113243. The reversal of 11222121113221 is 12231112122211.

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 10576089368100 + 646031745121 = 3252090^2 + 803761^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222121113221 - 2¹⁵ = 11222121080453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222121113192 and 11222121113201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222121114221) 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, 28482540700 + ... + 28482541093.

It is an arithmetic number, because the mean of its divisors is an integer number (2819771548803).

Almost surely, 2^{11222121113221} is an apocalyptic number.

It is an amenable number.

11222121113221 is a deficient number, since it is larger than the sum of its proper divisors (56965081991).

11222121113221 is an equidigital number, since it uses as much as digits as its factorization.

11222121113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56965081990.

The product of its digits is 192, while the sum is 22.

Adding to 11222121113221 its reverse (12231112122211), we get a palindrome (23453233235432).

The spelling of 11222121113221 in words is "eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred thirteen thousand, two hundred twenty-one".