11201221021211 has 16 divisors (see below), whose sum is σ = 12185845957824. Its totient is φ = 10234667274624.

The previous prime is 11201221021171. The next prime is 11201221021229. The reversal of 11201221021211 is 11212012210211.

It is not a de Polignac number, because 11201221021211 - 2³⁴ = 11184041152027 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 11201221021211.

It is not an unprimeable number, because it can be changed into a prime (11201221021231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9896876 + ... + 10970441.

It is an arithmetic number, because the mean of its divisors is an integer number (761615372364).

Almost surely, 2^{11201221021211} is an apocalyptic number.

11201221021211 is a deficient number, since it is larger than the sum of its proper divisors (984624936613).

11201221021211 is a wasteful number, since it uses less digits than its factorization.

11201221021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20867750.

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

Adding to 11201221021211 its reverse (11212012210211), we get a palindrome (22413233231422).

The spelling of 11201221021211 in words is "eleven trillion, two hundred one billion, two hundred twenty-one million, twenty-one thousand, two hundred eleven".