320124440221 has 2 divisors, whose sum is σ = 320124440222. Its totient is φ = 320124440220.

The previous prime is 320124440219. The next prime is 320124440291. The reversal of 320124440221 is 122044421023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309819144996 + 10305295225 = 556614^2 + 101515^2 .

It is a cyclic number.

It is not a de Polignac number, because 320124440221 - 2¹ = 320124440219 is a prime.

Together with 320124440219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320124440291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160062220110 + 160062220111.

It is an arithmetic number, because the mean of its divisors is an integer number (160062220111).

Almost surely, 2^320124440221 is an apocalyptic number.

It is an amenable number.

320124440221 is a deficient number, since it is larger than the sum of its proper divisors (1).

320124440221 is an equidigital number, since it uses as much as digits as its factorization.

320124440221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 320124440221 its reverse (122044421023), we get a palindrome (442168861244).

The spelling of 320124440221 in words is "three hundred twenty billion, one hundred twenty-four million, four hundred forty thousand, two hundred twenty-one".