12221323111 has 4 divisors (see below), whose sum is σ = 12335541192. Its totient is φ = 12107105032.

The previous prime is 12221322991. The next prime is 12221323141. The reversal of 12221323111 is 11132312221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11132312221 = 227 ⋅49041023.

It is a cyclic number.

It is not a de Polignac number, because 12221323111 - 2¹⁵ = 12221290343 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 (12221323141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57108880 + ... + 57109093.

It is an arithmetic number, because the mean of its divisors is an integer number (3083885298).

Almost surely, 2^12221323111 is an apocalyptic number.

12221323111 is a deficient number, since it is larger than the sum of its proper divisors (114218081).

12221323111 is a wasteful number, since it uses less digits than its factorization.

12221323111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114218080.

The product of its digits is 144, while the sum is 19.

Adding to 12221323111 its reverse (11132312221), we get a palindrome (23353635332).

The spelling of 12221323111 in words is "twelve billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred eleven".