12221331223 has 4 divisors (see below), whose sum is σ = 12253241088. Its totient is φ = 12189421360.

The previous prime is 12221331191. The next prime is 12221331233. The reversal of 12221331223 is 32213312221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32213312221 = 69859 ⋅461119.

It is a cyclic number.

It is not a de Polignac number, because 12221331223 - 2⁵ = 12221331191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221331194 and 12221331203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221331233) 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, 15954358 + ... + 15955123.

It is an arithmetic number, because the mean of its divisors is an integer number (3063310272).

Almost surely, 2^12221331223 is an apocalyptic number.

12221331223 is a deficient number, since it is larger than the sum of its proper divisors (31909865).

12221331223 is an equidigital number, since it uses as much as digits as its factorization.

12221331223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31909864.

The product of its digits is 864, while the sum is 22.

Adding to 12221331223 its reverse (32213312221), we get a palindrome (44434643444).

The spelling of 12221331223 in words is "twelve billion, two hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-three".