11212211221011 has 12 divisors (see below), whose sum is σ = 16633130160192. Its totient is φ = 7272785656656.

The previous prime is 11212211220997. The next prime is 11212211221033. The reversal of 11212211221011 is 11012211221211.

It is a happy number.

11212211221011 is a `hidden beast` number, since 11 + 212 + 211 + 221 + 0 + 11 = 666.

It is not a de Polignac number, because 11212211221011 - 2⁹ = 11212211220499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11212211222011) 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 11 ways as a sum of consecutive naturals, for example, 16835151651 + ... + 16835152316.

It is an arithmetic number, because the mean of its divisors is an integer number (1386094180016).

Almost surely, 2^{11212211221011} is an apocalyptic number.

11212211221011 is a deficient number, since it is larger than the sum of its proper divisors (5420918939181).

11212211221011 is a wasteful number, since it uses less digits than its factorization.

11212211221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33670304010 (or 33670304007 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11212211221011 its reverse (11012211221211), we get a palindrome (22224422442222).

The spelling of 11212211221011 in words is "eleven trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty-one thousand, eleven".