221441331422321 has 4 divisors (see below), whose sum is σ = 221441378896500. Its totient is φ = 221441283948144.

The previous prime is 221441331422237. The next prime is 221441331422387. The reversal of 221441331422321 is 123224133144122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81858070527025 + 139583260895296 = 9047545^2 + 11814536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221441331422321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221441336422321) 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, 15871646 + ... + 26358903.

It is an arithmetic number, because the mean of its divisors is an integer number (55360344724125).

Almost surely, 2^{221441331422321} is an apocalyptic number.

It is an amenable number.

221441331422321 is a deficient number, since it is larger than the sum of its proper divisors (47474179).

221441331422321 is an equidigital number, since it uses as much as digits as its factorization.

221441331422321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47474178.

The product of its digits is 55296, while the sum is 35.

Adding to 221441331422321 its reverse (123224133144122), we get a palindrome (344665464566443).

The spelling of 221441331422321 in words is "two hundred twenty-one trillion, four hundred forty-one billion, three hundred thirty-one million, four hundred twenty-two thousand, three hundred twenty-one".