11101221102221 has 16 divisors (see below), whose sum is σ = 11786624233344. Its totient is φ = 10419440338944.

The previous prime is 11101221102107. The next prime is 11101221102241. The reversal of 11101221102221 is 12220112210111.

It is not a de Polignac number, because 11101221102221 - 2²² = 11101216907917 is a prime.

It is a super-2 number, since 2×11101221102221² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11101221102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101221102241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14824616 + ... + 15555438.

It is an arithmetic number, because the mean of its divisors is an integer number (736664014584).

Almost surely, 2^{11101221102221} is an apocalyptic number.

It is an amenable number.

11101221102221 is a deficient number, since it is larger than the sum of its proper divisors (685403131123).

11101221102221 is a wasteful number, since it uses less digits than its factorization.

11101221102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733300.

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

Adding to 11101221102221 its reverse (12220112210111), we get a palindrome (23321333312332).

The spelling of 11101221102221 in words is "eleven trillion, one hundred one billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".