12221201323221 has 8 divisors (see below), whose sum is σ = 17776292833824. Its totient is φ = 7406788680720.

The previous prime is 12221201323217. The next prime is 12221201323229. The reversal of 12221201323221 is 12232310212221.

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

It is not a de Polignac number, because 12221201323221 - 2² = 12221201323217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221201323191 and 12221201323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221201323229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185169716986 + ... + 185169717051.

It is an arithmetic number, because the mean of its divisors is an integer number (2222036604228).

Almost surely, 2^{12221201323221} is an apocalyptic number.

12221201323221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12221201323221 is a deficient number, since it is larger than the sum of its proper divisors (5555091510603).

12221201323221 is a wasteful number, since it uses less digits than its factorization.

12221201323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370339434051.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 12221201323221 its reverse (12232310212221), we get a palindrome (24453511535442).

The spelling of 12221201323221 in words is "twelve trillion, two hundred twenty-one billion, two hundred one million, three hundred twenty-three thousand, two hundred twenty-one".