1003203320321 has 4 divisors (see below), whose sum is σ = 1003386492372. Its totient is φ = 1003020148272.

The previous prime is 1003203320293. The next prime is 1003203320351. The reversal of 1003203320321 is 1230233023001.

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 643396494400 + 359806825921 = 802120^2 + 599839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003203320321 - 2¹⁰ = 1003203319297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1003203320293 and 1003203320302.

It is not an unprimeable number, because it can be changed into a prime (1003203320351) 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 in 3 ways as a sum of consecutive naturals, for example, 91577810 + ... + 91588763.

It is an arithmetic number, because the mean of its divisors is an integer number (250846623093).

Almost surely, 2^{1003203320321} is an apocalyptic number.

It is an amenable number.

1003203320321 is a deficient number, since it is larger than the sum of its proper divisors (183172051).

1003203320321 is an equidigital number, since it uses as much as digits as its factorization.

1003203320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183172050.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 1003203320321 its reverse (1230233023001), we get a palindrome (2233436343322).

The spelling of 1003203320321 in words is "one trillion, three billion, two hundred three million, three hundred twenty thousand, three hundred twenty-one".