11122220210221 has 4 divisors (see below), whose sum is σ = 11128932475132. Its totient is φ = 11115507945312.

The previous prime is 11122220210191. The next prime is 11122220210261. The reversal of 11122220210221 is 12201202222111.

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 1472312865321 + 9649907344900 = 1213389^2 + 3106430^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122220210221 - 2¹⁹ = 11122219685933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122220210261) 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, 3356129970 + ... + 3356133283.

It is an arithmetic number, because the mean of its divisors is an integer number (2782233118783).

Almost surely, 2^{11122220210221} is an apocalyptic number.

It is an amenable number.

11122220210221 is a deficient number, since it is larger than the sum of its proper divisors (6712264911).

11122220210221 is an equidigital number, since it uses as much as digits as its factorization.

11122220210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6712264910.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11122220210221 its reverse (12201202222111), we get a palindrome (23323422432332).

The spelling of 11122220210221 in words is "eleven trillion, one hundred twenty-two billion, two hundred twenty million, two hundred ten thousand, two hundred twenty-one".