11211201121 has 16 divisors (see below), whose sum is σ = 11831500800. Its totient is φ = 10602206208.

The previous prime is 11211201109. The next prime is 11211201149. The reversal of 11211201121 is 12110211211.

It is a happy number.

11211201121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11211201121 - 2¹⁷ = 11211070049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211201151) 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 15 ways as a sum of consecutive naturals, for example, 2851485 + ... + 2855413.

It is an arithmetic number, because the mean of its divisors is an integer number (739468800).

Almost surely, 2^11211201121 is an apocalyptic number.

It is an amenable number.

11211201121 is a deficient number, since it is larger than the sum of its proper divisors (620299679).

11211201121 is a wasteful number, since it uses less digits than its factorization.

11211201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11211201121 its reverse (12110211211), we get a palindrome (23321412332).

The spelling of 11211201121 in words is "eleven billion, two hundred eleven million, two hundred one thousand, one hundred twenty-one".