12211221223 has 2 divisors, whose sum is σ = 12211221224. Its totient is φ = 12211221222.

The previous prime is 12211221181. The next prime is 12211221257. The reversal of 12211221223 is 32212211221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211221223 is a prime.

It is a super-2 number, since 2×12211221223² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12211221223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211221523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105610611 + 6105610612.

It is an arithmetic number, because the mean of its divisors is an integer number (6105610612).

Almost surely, 2^12211221223 is an apocalyptic number.

12211221223 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211221223 is an equidigital number, since it uses as much as digits as its factorization.

12211221223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 19.

Adding to 12211221223 its reverse (32212211221), we get a palindrome (44423432444).

The spelling of 12211221223 in words is "twelve billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-three".