11321111121 has 8 divisors (see below), whose sum is σ = 15982745184. Its totient is φ = 7103442240.

The previous prime is 11321111071. The next prime is 11321111141. The reversal of 11321111121 is 12111112311.

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

It is not a de Polignac number, because 11321111121 - 2¹⁷ = 11320980049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11321111121.

It is not an unprimeable number, because it can be changed into a prime (11321111141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110991235 + ... + 110991336.

It is an arithmetic number, because the mean of its divisors is an integer number (1997843148).

Almost surely, 2^11321111121 is an apocalyptic number.

It is an amenable number.

11321111121 is a deficient number, since it is larger than the sum of its proper divisors (4661634063).

11321111121 is a wasteful number, since it uses less digits than its factorization.

11321111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221982591.

The product of its digits is 12, while the sum is 15.

Adding to 11321111121 its reverse (12111112311), we get a palindrome (23432223432).

The spelling of 11321111121 in words is "eleven billion, three hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".