2211131121 has 16 divisors (see below), whose sum is σ = 3016915200. Its totient is φ = 1439842688.

The previous prime is 2211131113. The next prime is 2211131123. The reversal of 2211131121 is 1211311122.

It is a cyclic number.

It is not a de Polignac number, because 2211131121 - 2³ = 2211131113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2211131121.

It is not an unprimeable number, because it can be changed into a prime (2211131123) 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, 56365 + ... + 87173.

It is an arithmetic number, because the mean of its divisors is an integer number (188557200).

Almost surely, 2^2211131121 is an apocalyptic number.

It is an amenable number.

2211131121 is a deficient number, since it is larger than the sum of its proper divisors (805784079).

2211131121 is a wasteful number, since it uses less digits than its factorization.

2211131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31368.

The product of its digits is 24, while the sum is 15.

The square root of 2211131121 is about 47022.6660345838. Note that the first 3 decimals coincide. The cubic root of 2211131121 is about 1302.7812488442.

Adding to 2211131121 its reverse (1211311122), we get a palindrome (3422442243).

The spelling of 2211131121 in words is "two billion, two hundred eleven million, one hundred thirty-one thousand, one hundred twenty-one".