11200100021221 has 4 divisors (see below), whose sum is σ = 11858929434252. Its totient is φ = 10541270608192.

The previous prime is 11200100021147. The next prime is 11200100021287. The reversal of 11200100021221 is 12212000100211.

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 9104467404321 + 2095632616900 = 3017361^2 + 1447630^2 .

It is a cyclic number.

It is not a de Polignac number, because 11200100021221 - 2⁹ = 11200100020709 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 (11200100001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329414706490 + ... + 329414706523.

It is an arithmetic number, because the mean of its divisors is an integer number (2964732358563).

Almost surely, 2^{11200100021221} is an apocalyptic number.

It is an amenable number.

11200100021221 is a deficient number, since it is larger than the sum of its proper divisors (658829413031).

11200100021221 is an equidigital number, since it uses as much as digits as its factorization.

11200100021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658829413030.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11200100021221 its reverse (12212000100211), we get a palindrome (23412100121432).

The spelling of 11200100021221 in words is "eleven trillion, two hundred billion, one hundred million, twenty-one thousand, two hundred twenty-one".