1440221342221 has 16 divisors (see below), whose sum is σ = 1506941729280. Its totient is φ = 1373843933440.

The previous prime is 1440221342159. The next prime is 1440221342249. The reversal of 1440221342221 is 1222431220441.

It is a cyclic number.

It is not a de Polignac number, because 1440221342221 - 2⁹ = 1440221341709 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 1440221342221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440221342281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102624021 + ... + 102638053.

It is an arithmetic number, because the mean of its divisors is an integer number (94183858080).

Almost surely, 2^{1440221342221} is an apocalyptic number.

It is an amenable number.

1440221342221 is a deficient number, since it is larger than the sum of its proper divisors (66720387059).

1440221342221 is a wasteful number, since it uses less digits than its factorization.

1440221342221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25916.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1440221342221 its reverse (1222431220441), we get a palindrome (2662652562662).

The spelling of 1440221342221 in words is "one trillion, four hundred forty billion, two hundred twenty-one million, three hundred forty-two thousand, two hundred twenty-one".