12221122321 has 8 divisors (see below), whose sum is σ = 12564610784. Its totient is φ = 11880328320.

The previous prime is 12221122301. The next prime is 12221122327. The reversal of 12221122321 is 12322112221.

12221122321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12221122321 - 2¹¹ = 12221120273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221122327) 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 in 7 ways as a sum of consecutive naturals, for example, 664416 + ... + 682561.

It is an arithmetic number, because the mean of its divisors is an integer number (1570576348).

Almost surely, 2^12221122321 is an apocalyptic number.

It is an amenable number.

12221122321 is a deficient number, since it is larger than the sum of its proper divisors (343488463).

12221122321 is a wasteful number, since it uses less digits than its factorization.

12221122321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347231.

The product of its digits is 192, while the sum is 19.

Adding to 12221122321 its reverse (12322112221), we get a palindrome (24543234542).

It can be divided in two parts, 12221 and 122321, that multiplied together give a palindrome (1494884941).

The spelling of 12221122321 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, three hundred twenty-one".