11021122011221 has 16 divisors (see below), whose sum is σ = 12615358435200. Its totient is φ = 9431844753408.

The previous prime is 11021122011181. The next prime is 11021122011227. The reversal of 11021122011221 is 12211022112011.

It is not a de Polignac number, because 11021122011221 - 2⁶ = 11021122011157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11021122011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021122011227) 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, 10990265 + ... + 11951073.

It is an arithmetic number, because the mean of its divisors is an integer number (788459902200).

Almost surely, 2^{11021122011221} is an apocalyptic number.

It is an amenable number.

11021122011221 is a deficient number, since it is larger than the sum of its proper divisors (1594236423979).

11021122011221 is a wasteful number, since it uses less digits than its factorization.

11021122011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963388.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11021122011221 its reverse (12211022112011), we get a palindrome (23232144123232).

The spelling of 11021122011221 in words is "eleven trillion, twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred twenty-one".