11011221102221 has 4 divisors (see below), whose sum is σ = 11029361500032. Its totient is φ = 10993080704412.

The previous prime is 11011221102191. The next prime is 11011221102241. The reversal of 11011221102221 is 12220112211011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11011221102221 - 2¹⁸ = 11011220840077 is a prime.

It is a super-2 number, since 2×11011221102221² (a number of 27 digits) contains 22 as substring.

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 11011221102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011221102241) 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, 9070197995 + ... + 9070199208.

It is an arithmetic number, because the mean of its divisors is an integer number (2757340375008).

Almost surely, 2^{11011221102221} is an apocalyptic number.

It is an amenable number.

11011221102221 is a deficient number, since it is larger than the sum of its proper divisors (18140397811).

11011221102221 is an equidigital number, since it uses as much as digits as its factorization.

11011221102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140397810.

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

Adding to 11011221102221 its reverse (12220112211011), we get a palindrome (23231333313232).

The spelling of 11011221102221 in words is "eleven trillion, eleven billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".