12223221121 has 2 divisors, whose sum is σ = 12223221122. Its totient is φ = 12223221120.

The previous prime is 12223221071. The next prime is 12223221139. The reversal of 12223221121 is 12112232221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11540130625 + 683090496 = 107425^2 + 26136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12223221121 is a prime.

It is not a weakly prime, because it can be changed into another prime (12223221161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111610560 + 6111610561.

It is an arithmetic number, because the mean of its divisors is an integer number (6111610561).

Almost surely, 2^12223221121 is an apocalyptic number.

It is an amenable number.

12223221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12223221121 is an equidigital number, since it uses as much as digits as its factorization.

12223221121 is an evil number, because the sum of its binary digits is even.

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

Adding to 12223221121 its reverse (12112232221), we get a palindrome (24335453342).

It can be divided in two parts, 12223221 and 121, that multiplied together give a palindrome (1479009741).

The spelling of 12223221121 in words is "twelve billion, two hundred twenty-three million, two hundred twenty-one thousand, one hundred twenty-one".