12203021 has 2 divisors, whose sum is σ = 12203022. Its totient is φ = 12203020.

The previous prime is 12203011. The next prime is 12203039. The reversal of 12203021 is 12030221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6375625 + 5827396 = 2525^2 + 2414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12203021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12202993 and 12203011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12203011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6101510 + 6101511.

It is an arithmetic number, because the mean of its divisors is an integer number (6101511).

Almost surely, 2^12203021 is an apocalyptic number.

It is an amenable number.

12203021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12203021 is an equidigital number, since it uses as much as digits as its factorization.

12203021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12203021 is about 3493.2822674385. The cubic root of 12203021 is about 230.2267518024.

Adding to 12203021 its reverse (12030221), we get a palindrome (24233242).

It can be divided in two parts, 1 and 2203021, that added together give a palindrome (2203022).

The spelling of 12203021 in words is "twelve million, two hundred three thousand, twenty-one".