1323201232221 has 64 divisors (see below), whose sum is σ = 1959305677056. Its totient is φ = 787604428800.

The previous prime is 1323201232189. The next prime is 1323201232231. The reversal of 1323201232221 is 1222321023231.

It is not a de Polignac number, because 1323201232221 - 2⁵ = 1323201232189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1323201232191 and 1323201232200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323201232231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 808307815 + ... + 808309451.

It is an arithmetic number, because the mean of its divisors is an integer number (30614151204).

Almost surely, 2^{1323201232221} is an apocalyptic number.

1323201232221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1323201232221 is a deficient number, since it is larger than the sum of its proper divisors (636104444835).

1323201232221 is a wasteful number, since it uses less digits than its factorization.

1323201232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1323201232221 its reverse (1222321023231), we get a palindrome (2545522255452).

The spelling of 1323201232221 in words is "one trillion, three hundred twenty-three billion, two hundred one million, two hundred thirty-two thousand, two hundred twenty-one".