11212221211011 has 12 divisors (see below), whose sum is σ = 16633144980192. Its totient is φ = 7272792136656.

The previous prime is 11212221211007. The next prime is 11212221211019. The reversal of 11212221211011 is 11011212221211.

It is a happy number.

11212221211011 is a `hidden beast` number, since 11 + 212 + 221 + 211 + 0 + 11 = 666.

It is not a de Polignac number, because 11212221211011 - 2² = 11212221211007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11212221211019) 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 11 ways as a sum of consecutive naturals, for example, 16835166651 + ... + 16835167316.

It is an arithmetic number, because the mean of its divisors is an integer number (1386095415016).

Almost surely, 2^{11212221211011} is an apocalyptic number.

11212221211011 is a deficient number, since it is larger than the sum of its proper divisors (5420923769181).

11212221211011 is a wasteful number, since it uses less digits than its factorization.

11212221211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33670334010 (or 33670334007 counting only the distinct ones).

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

Adding to 11212221211011 its reverse (11011212221211), we get a palindrome (22223433432222).

The spelling of 11212221211011 in words is "eleven trillion, two hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, eleven".