11321120111 has 4 divisors (see below), whose sum is σ = 12938422992. Its totient is φ = 9703817232.

The previous prime is 11321120089. The next prime is 11321120119. The reversal of 11321120111 is 11102112311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11321120111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321120119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808651430 + ... + 808651443.

It is an arithmetic number, because the mean of its divisors is an integer number (3234605748).

Almost surely, 2^11321120111 is an apocalyptic number.

11321120111 is a deficient number, since it is larger than the sum of its proper divisors (1617302881).

11321120111 is an equidigital number, since it uses as much as digits as its factorization.

11321120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617302880.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11321120111 its reverse (11102112311), we get a palindrome (22423232422).

The spelling of 11321120111 in words is "eleven billion, three hundred twenty-one million, one hundred twenty thousand, one hundred eleven".