11221200102221 has 4 divisors (see below), whose sum is σ = 11241345883932. Its totient is φ = 11201054320512.

The previous prime is 11221200102191. The next prime is 11221200102241. The reversal of 11221200102221 is 12220100212211.

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 430067082025 + 10791133020196 = 655795^2 + 3284986^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221200102221 - 2¹⁰ = 11221200101197 is a prime.

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 11221200102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221200102241) 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, 10072890020 + ... + 10072891133.

It is an arithmetic number, because the mean of its divisors is an integer number (2810336470983).

Almost surely, 2^{11221200102221} is an apocalyptic number.

It is an amenable number.

11221200102221 is a deficient number, since it is larger than the sum of its proper divisors (20145781711).

11221200102221 is an equidigital number, since it uses as much as digits as its factorization.

11221200102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20145781710.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11221200102221 its reverse (12220100212211), we get a palindrome (23441300314432).

The spelling of 11221200102221 in words is "eleven trillion, two hundred twenty-one billion, two hundred million, one hundred two thousand, two hundred twenty-one".