11101202121221 has 8 divisors (see below), whose sum is σ = 11215777380864. Its totient is φ = 10986629512320.

The previous prime is 11101202121209. The next prime is 11101202121259. The reversal of 11101202121221 is 12212120210111.

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

It is a cyclic number.

It is not a de Polignac number, because 11101202121221 - 2³⁰ = 11100128379397 is a prime.

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 11101202121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101202121271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8391506 + ... + 9623916.

It is an arithmetic number, because the mean of its divisors is an integer number (1401972172608).

Almost surely, 2^{11101202121221} is an apocalyptic number.

It is an amenable number.

11101202121221 is a deficient number, since it is larger than the sum of its proper divisors (114575259643).

11101202121221 is an equidigital number, since it uses as much as digits as its factorization.

11101202121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325371.

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

Adding to 11101202121221 its reverse (12212120210111), we get a palindrome (23313322331332).

The spelling of 11101202121221 in words is "eleven trillion, one hundred one billion, two hundred two million, one hundred twenty-one thousand, two hundred twenty-one".