11321220111 has 16 divisors (see below), whose sum is σ = 15317786880. Its totient is φ = 7436283840.

The previous prime is 11321220109. The next prime is 11321220217. The reversal of 11321220111 is 11102212311.

It is not a de Polignac number, because 11321220111 - 2¹ = 11321220109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321220101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186030 + ... + 239268.

It is an arithmetic number, because the mean of its divisors is an integer number (957361680).

Almost surely, 2^11321220111 is an apocalyptic number.

11321220111 is a deficient number, since it is larger than the sum of its proper divisors (3996566769).

11321220111 is an equidigital number, since it uses as much as digits as its factorization.

11321220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54286.

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

Adding to 11321220111 its reverse (11102212311), we get a palindrome (22423432422).

The spelling of 11321220111 in words is "eleven billion, three hundred twenty-one million, two hundred twenty thousand, one hundred eleven".