12223222021 has 2 divisors, whose sum is σ = 12223222022. Its totient is φ = 12223222020.

The previous prime is 12223222019. The next prime is 12223222027. The reversal of 12223222021 is 12022232221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11904992100 + 318229921 = 109110^2 + 17839^2 .

It is a cyclic number.

It is not a de Polignac number, because 12223222021 - 2¹ = 12223222019 is a prime.

Together with 12223222019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12223222021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12223222027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111611010 + 6111611011.

It is an arithmetic number, because the mean of its divisors is an integer number (6111611011).

Almost surely, 2^12223222021 is an apocalyptic number.

It is an amenable number.

12223222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12223222021 is an equidigital number, since it uses as much as digits as its factorization.

12223222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 12223222021 its reverse (12022232221), we get a palindrome (24245454242).

The spelling of 12223222021 in words is "twelve billion, two hundred twenty-three million, two hundred twenty-two thousand, twenty-one".