445024212323221 has 2 divisors, whose sum is σ = 445024212323222. Its totient is φ = 445024212323220.

The previous prime is 445024212323219. The next prime is 445024212323227. The reversal of 445024212323221 is 122323212420544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318348061820721 + 126676150502500 = 17842311^2 + 11255050^2 .

It is a cyclic number.

It is not a de Polignac number, because 445024212323221 - 2¹ = 445024212323219 is a prime.

Together with 445024212323219, 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 (445024212323227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222512106161610 + 222512106161611.

It is an arithmetic number, because the mean of its divisors is an integer number (222512106161611).

Almost surely, 2^{445024212323221} is an apocalyptic number.

It is an amenable number.

445024212323221 is a deficient number, since it is larger than the sum of its proper divisors (1).

445024212323221 is an equidigital number, since it uses as much as digits as its factorization.

445024212323221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 445024212323221 its reverse (122323212420544), we get a palindrome (567347424743765).

The spelling of 445024212323221 in words is "four hundred forty-five trillion, twenty-four billion, two hundred twelve million, three hundred twenty-three thousand, two hundred twenty-one".