11121220211 has 8 divisors (see below), whose sum is σ = 11224308480. Its totient is φ = 11018566728.

The previous prime is 11121220207. The next prime is 11121220267. The reversal of 11121220211 is 11202212111.

11121220211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11121220211 - 2² = 11121220207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121220711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57191 + ... + 159728.

It is an arithmetic number, because the mean of its divisors is an integer number (1403038560).

Almost surely, 2^11121220211 is an apocalyptic number.

11121220211 is a deficient number, since it is larger than the sum of its proper divisors (103088269).

11121220211 is a wasteful number, since it uses less digits than its factorization.

11121220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217393.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11121220211 its reverse (11202212111), we get a palindrome (22323432322).

The spelling of 11121220211 in words is "eleven billion, one hundred twenty-one million, two hundred twenty thousand, two hundred eleven".