321420244213441 has 4 divisors (see below), whose sum is σ = 321420791463300. Its totient is φ = 321419696963584.

The previous prime is 321420244213429. The next prime is 321420244213603. The reversal of 321420244213441 is 144312442024123.

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 138798534875841 + 182621709337600 = 11781279^2 + 13513760^2 .

It is a cyclic number.

It is not a de Polignac number, because 321420244213441 - 2⁹ = 321420244212929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321420244213441.

It is not an unprimeable number, because it can be changed into a prime (321420244213141) 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, 272742976 + ... + 273918913.

It is an arithmetic number, because the mean of its divisors is an integer number (80355197865825).

Almost surely, 2^{321420244213441} is an apocalyptic number.

It is an amenable number.

321420244213441 is a deficient number, since it is larger than the sum of its proper divisors (547249859).

321420244213441 is an equidigital number, since it uses as much as digits as its factorization.

321420244213441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547249858.

The product of its (nonzero) digits is 147456, while the sum is 37.

Adding to 321420244213441 its reverse (144312442024123), we get a palindrome (465732686237564).

The spelling of 321420244213441 in words is "three hundred twenty-one trillion, four hundred twenty billion, two hundred forty-four million, two hundred thirteen thousand, four hundred forty-one".