11100220021221 has 8 divisors (see below), whose sum is σ = 14809885262400. Its totient is φ = 7395350730432.

The previous prime is 11100220021213. The next prime is 11100220021229. The reversal of 11100220021221 is 12212002200111.

It is an interprime number because it is at equal distance from previous prime (11100220021213) and next prime (11100220021229).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11100220021221 - 2³ = 11100220021213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11100220021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100220021229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1198982196 + ... + 1198991453.

It is an arithmetic number, because the mean of its divisors is an integer number (1851235657800).

Almost surely, 2^{11100220021221} is an apocalyptic number.

It is an amenable number.

11100220021221 is a deficient number, since it is larger than the sum of its proper divisors (3709665241179).

11100220021221 is a wasteful number, since it uses less digits than its factorization.

11100220021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397975195.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11100220021221 its reverse (12212002200111), we get a palindrome (23312222221332).

The spelling of 11100220021221 in words is "eleven trillion, one hundred billion, two hundred twenty million, twenty-one thousand, two hundred twenty-one".