1305043440221 has 24 divisors (see below), whose sum is σ = 1384963696512. Its totient is φ = 1229011963200.

The previous prime is 1305043440193. The next prime is 1305043440257. The reversal of 1305043440221 is 1220443405031.

It is not a de Polignac number, because 1305043440221 - 2⁶ = 1305043440157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305043440271) 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 in 23 ways as a sum of consecutive naturals, for example, 11140265 + ... + 11256801.

It is an arithmetic number, because the mean of its divisors is an integer number (57706820688).

Almost surely, 2^{1305043440221} is an apocalyptic number.

It is an amenable number.

1305043440221 is a deficient number, since it is larger than the sum of its proper divisors (79920256291).

1305043440221 is a wasteful number, since it uses less digits than its factorization.

1305043440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116913 (or 116882 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 1305043440221 its reverse (1220443405031), we get a palindrome (2525486845252).

The spelling of 1305043440221 in words is "one trillion, three hundred five billion, forty-three million, four hundred forty thousand, two hundred twenty-one".