11201221221212 has 48 divisors (see below), whose sum is σ = 22433105157120. Its totient is φ = 4846658443200.

The previous prime is 11201221221163. The next prime is 11201221221227. The reversal of 11201221221212 is 21212212210211.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61729028 + ... + 61910219.

It is an arithmetic number, because the mean of its divisors is an integer number (467356357440).

Almost surely, 2^{11201221221212} is an apocalyptic number.

It is an amenable number.

11201221221212 is an abundant number, since it is smaller than the sum of its proper divisors (11231883935908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11201221221212 is a wasteful number, since it uses less digits than its factorization.

11201221221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123639362 (or 123639360 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11201221221212 its reverse (21212212210211), we get a palindrome (32413433431423).

The spelling of 11201221221212 in words is "eleven trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".