11220211121121 has 48 divisors (see below), whose sum is σ = 16908365440512. Its totient is φ = 7164030451200.

The previous prime is 11220211121117. The next prime is 11220211121167. The reversal of 11220211121121 is 12112111202211.

It is a happy number.

11220211121121 is a `hidden beast` number, since 1 + 1 + 220 + 211 + 1 + 211 + 21 = 666.

11220211121121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11220211121121 - 2² = 11220211121117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220211121094 and 11220211121103.

It is not an unprimeable number, because it can be changed into a prime (11220211121101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5185336 + ... + 7023398.

It is an arithmetic number, because the mean of its divisors is an integer number (352257613344).

Almost surely, 2^{11220211121121} is an apocalyptic number.

It is an amenable number.

11220211121121 is a deficient number, since it is larger than the sum of its proper divisors (5688154319391).

11220211121121 is a wasteful number, since it uses less digits than its factorization.

11220211121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838414 (or 1838411 counting only the distinct ones).

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

Adding to 11220211121121 its reverse (12112111202211), we get a palindrome (23332322323332).

The spelling of 11220211121121 in words is "eleven trillion, two hundred twenty billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twenty-one".