12221302321 has 2 divisors, whose sum is σ = 12221302322. Its totient is φ = 12221302320.

The previous prime is 12221302307. The next prime is 12221302337. The reversal of 12221302321 is 12320312221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6317070400 + 5904231921 = 79480^2 + 76839^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221302321 - 2¹⁹ = 12220778033 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221302021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110651160 + 6110651161.

It is an arithmetic number, because the mean of its divisors is an integer number (6110651161).

Almost surely, 2^12221302321 is an apocalyptic number.

It is an amenable number.

12221302321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221302321 is an equidigital number, since it uses as much as digits as its factorization.

12221302321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12221302321 its reverse (12320312221), we get a palindrome (24541614542).

The spelling of 12221302321 in words is "twelve billion, two hundred twenty-one million, three hundred two thousand, three hundred twenty-one".