12203444021 has 2 divisors, whose sum is σ = 12203444022. Its totient is φ = 12203444020.

The previous prime is 12203443969. The next prime is 12203444023. The reversal of 12203444021 is 12044430221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8928171121 + 3275272900 = 94489^2 + 57230^2 .

It is a cyclic number.

It is not a de Polignac number, because 12203444021 - 2²⁶ = 12136335157 is a prime.

Together with 12203444023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12203444023) 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 as a sum of consecutive naturals, namely, 6101722010 + 6101722011.

It is an arithmetic number, because the mean of its divisors is an integer number (6101722011).

Almost surely, 2^12203444021 is an apocalyptic number.

It is an amenable number.

12203444021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12203444021 is an equidigital number, since it uses as much as digits as its factorization.

12203444021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12203444021 its reverse (12044430221), we get a palindrome (24247874242).

The spelling of 12203444021 in words is "twelve billion, two hundred three million, four hundred forty-four thousand, twenty-one".