12231303221 has 2 divisors, whose sum is σ = 12231303222. Its totient is φ = 12231303220.

The previous prime is 12231303209. The next prime is 12231303247. The reversal of 12231303221 is 12230313221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11971642225 + 259660996 = 109415^2 + 16114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12231303221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12231303193 and 12231303202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12231303281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6115651610 + 6115651611.

It is an arithmetic number, because the mean of its divisors is an integer number (6115651611).

Almost surely, 2^12231303221 is an apocalyptic number.

It is an amenable number.

12231303221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231303221 is an equidigital number, since it uses as much as digits as its factorization.

12231303221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12231303221 its reverse (12230313221), we get a palindrome (24461616442).

The spelling of 12231303221 in words is "twelve billion, two hundred thirty-one million, three hundred three thousand, two hundred twenty-one".