12303011221 has 2 divisors, whose sum is σ = 12303011222. Its totient is φ = 12303011220.

The previous prime is 12303011183. The next prime is 12303011251. The reversal of 12303011221 is 12211030321.

12303011221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11769863121 + 533148100 = 108489^2 + 23090^2 .

It is a cyclic number.

It is not a de Polignac number, because 12303011221 - 2²⁷ = 12168793493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12303011195 and 12303011204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12303011251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6151505610 + 6151505611.

It is an arithmetic number, because the mean of its divisors is an integer number (6151505611).

Almost surely, 2^12303011221 is an apocalyptic number.

It is an amenable number.

12303011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12303011221 is an equidigital number, since it uses as much as digits as its factorization.

12303011221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12303011221 its reverse (12211030321), we get a palindrome (24514041542).

The spelling of 12303011221 in words is "twelve billion, three hundred three million, eleven thousand, two hundred twenty-one".