11111201121 has 32 divisors (see below), whose sum is σ = 16074000000. Its totient is φ = 6803274240.

The previous prime is 11111201113. The next prime is 11111201149. The reversal of 11111201121 is 12110211111.

11111201121 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 11111201121 - 2³ = 11111201113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111201097 and 11111201106.

It is not an unprimeable number, because it can be changed into a prime (11111202121) 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 31 ways as a sum of consecutive naturals, for example, 583255 + ... + 602003.

It is an arithmetic number, because the mean of its divisors is an integer number (502312500).

Almost surely, 2^11111201121 is an apocalyptic number.

It is an amenable number.

11111201121 is a deficient number, since it is larger than the sum of its proper divisors (4962798879).

11111201121 is a wasteful number, since it uses less digits than its factorization.

11111201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19089.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11111201121 its reverse (12110211111), we get a palindrome (23221412232).

The spelling of 11111201121 in words is "eleven billion, one hundred eleven million, two hundred one thousand, one hundred twenty-one".