1002444221321 has 4 divisors (see below), whose sum is σ = 1002453725700. Its totient is φ = 1002434716944.

The previous prime is 1002444221309. The next prime is 1002444221347. The reversal of 1002444221321 is 1231224442001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 477949612921 + 524494608400 = 691339^2 + 724220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002444221321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002444221351) 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, 4592186 + ... + 4805523.

It is an arithmetic number, because the mean of its divisors is an integer number (250613431425).

Almost surely, 2^{1002444221321} is an apocalyptic number.

It is an amenable number.

1002444221321 is a deficient number, since it is larger than the sum of its proper divisors (9504379).

1002444221321 is an equidigital number, since it uses as much as digits as its factorization.

1002444221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9504378.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 1002444221321 its reverse (1231224442001), we get a palindrome (2233668663322).

The spelling of 1002444221321 in words is "one trillion, two billion, four hundred forty-four million, two hundred twenty-one thousand, three hundred twenty-one".