1044004013321 has 2 divisors, whose sum is σ = 1044004013322. Its totient is φ = 1044004013320.

The previous prime is 1044004013317. The next prime is 1044004013357. The reversal of 1044004013321 is 1233104004401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 750884639296 + 293119374025 = 866536^2 + 541405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044004013321 - 2² = 1044004013317 is a prime.

It is not a weakly prime, because it can be changed into another prime (1044004033321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522002006660 + 522002006661.

It is an arithmetic number, because the mean of its divisors is an integer number (522002006661).

Almost surely, 2^{1044004013321} is an apocalyptic number.

It is an amenable number.

1044004013321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044004013321 is an equidigital number, since it uses as much as digits as its factorization.

1044004013321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1044004013321 its reverse (1233104004401), we get a palindrome (2277108017722).

The spelling of 1044004013321 in words is "one trillion, forty-four billion, four million, thirteen thousand, three hundred twenty-one".