12221221103321 has 4 divisors (see below), whose sum is σ = 12221229430692. Its totient is φ = 12221212775952.

The previous prime is 12221221103317. The next prime is 12221221103387. The reversal of 12221221103321 is 12330112212221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8841488159296 + 3379732944025 = 2973464^2 + 1838405^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221221103321 - 2² = 12221221103317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12221221105321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310630 + ... + 5114703.

It is an arithmetic number, because the mean of its divisors is an integer number (3055307357673).

Almost surely, 2^{12221221103321} is an apocalyptic number.

It is an amenable number.

12221221103321 is a deficient number, since it is larger than the sum of its proper divisors (8327371).

12221221103321 is an equidigital number, since it uses as much as digits as its factorization.

12221221103321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327370.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12221221103321 its reverse (12330112212221), we get a palindrome (24551333315542).

The spelling of 12221221103321 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred three thousand, three hundred twenty-one".