545411221321 has 2 divisors, whose sum is σ = 545411221322. Its totient is φ = 545411221320.

The previous prime is 545411221301. The next prime is 545411221339. The reversal of 545411221321 is 123122114545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363584880400 + 181826340921 = 602980^2 + 426411^2 .

It is a cyclic number.

It is not a de Polignac number, because 545411221321 - 2¹¹ = 545411219273 is a prime.

It is not a weakly prime, because it can be changed into another prime (545411221301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272705610660 + 272705610661.

It is an arithmetic number, because the mean of its divisors is an integer number (272705610661).

Almost surely, 2^545411221321 is an apocalyptic number.

It is an amenable number.

545411221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

545411221321 is an equidigital number, since it uses as much as digits as its factorization.

545411221321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 31.

Adding to 545411221321 its reverse (123122114545), we get a palindrome (668533335866).

The spelling of 545411221321 in words is "five hundred forty-five billion, four hundred eleven million, two hundred twenty-one thousand, three hundred twenty-one".