1042440002321 has 4 divisors (see below), whose sum is σ = 1042442044644. Its totient is φ = 1042437960000.

The previous prime is 1042440002311. The next prime is 1042440002341. The reversal of 1042440002321 is 1232000442401.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 259117649296 + 783322353025 = 509036^2 + 885055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042440002321 - 2³⁰ = 1041366260497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1042440002311) 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, 483341 + ... + 1522661.

It is an arithmetic number, because the mean of its divisors is an integer number (260610511161).

Almost surely, 2^{1042440002321} is an apocalyptic number.

It is an amenable number.

1042440002321 is a deficient number, since it is larger than the sum of its proper divisors (2042323).

1042440002321 is a wasteful number, since it uses less digits than its factorization.

1042440002321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042322.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 1042440002321 its reverse (1232000442401), we get a palindrome (2274440444722).

The spelling of 1042440002321 in words is "one trillion, forty-two billion, four hundred forty million, two thousand, three hundred twenty-one".