12212213223 has 16 divisors (see below), whose sum is σ = 18611601920. Its totient is φ = 6977464416.

The previous prime is 12212213207. The next prime is 12212213227. The reversal of 12212213223 is 32231221221.

It is not a de Polignac number, because 12212213223 - 2⁴ = 12212213207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12212213223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212213227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138486 + ... + 208812.

It is an arithmetic number, because the mean of its divisors is an integer number (1163225120).

Almost surely, 2^12212213223 is an apocalyptic number.

12212213223 is a deficient number, since it is larger than the sum of its proper divisors (6399388697).

12212213223 is an equidigital number, since it uses as much as digits as its factorization.

12212213223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78606.

The product of its digits is 576, while the sum is 21.

Adding to 12212213223 its reverse (32231221221), we get a palindrome (44443434444).

The spelling of 12212213223 in words is "twelve billion, two hundred twelve million, two hundred thirteen thousand, two hundred twenty-three".