1203303220321 has 4 divisors (see below), whose sum is σ = 1203307471044. Its totient is φ = 1203298969600.

The previous prime is 1203303220247. The next prime is 1203303220331. The reversal of 1203303220321 is 1230223033021.

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 496652829696 + 706650390625 = 704736^2 + 840625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203303220321 - 2¹⁷ = 1203303089249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203303220292 and 1203303220301.

It is not an unprimeable number, because it can be changed into a prime (1203303220331) 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, 1667920 + ... + 2277841.

It is an arithmetic number, because the mean of its divisors is an integer number (300826867761).

Almost surely, 2^{1203303220321} is an apocalyptic number.

It is an amenable number.

1203303220321 is a deficient number, since it is larger than the sum of its proper divisors (4250723).

1203303220321 is an equidigital number, since it uses as much as digits as its factorization.

1203303220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250722.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 1203303220321 its reverse (1230223033021), we get a palindrome (2433526253342).

The spelling of 1203303220321 in words is "one trillion, two hundred three billion, three hundred three million, two hundred twenty thousand, three hundred twenty-one".