11210211111221 has 16 divisors (see below), whose sum is σ = 11908994169600. Its totient is φ = 10515835169280.

The previous prime is 11210211111191. The next prime is 11210211111227. The reversal of 11210211111221 is 12211111201211.

It is a cyclic number.

It is not a de Polignac number, because 11210211111221 - 2¹⁴ = 11210211094837 is a prime.

It is a super-2 number, since 2×11210211111221² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 11210211111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210211111227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10071281 + ... + 11128841.

It is an arithmetic number, because the mean of its divisors is an integer number (744312135600).

Almost surely, 2^{11210211111221} is an apocalyptic number.

It is an amenable number.

11210211111221 is a deficient number, since it is larger than the sum of its proper divisors (698783058379).

11210211111221 is a wasteful number, since it uses less digits than its factorization.

11210211111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059644.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11210211111221 its reverse (12211111201211), we get a palindrome (23421322312432).

The spelling of 11210211111221 in words is "eleven trillion, two hundred ten billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty-one".