1303203221321 has 12 divisors (see below), whose sum is σ = 1353575510676. Its totient is φ = 1254629698560.

The previous prime is 1303203221293. The next prime is 1303203221381. The reversal of 1303203221321 is 1231223023031.

It can be written as a sum of positive squares in 2 ways, for example, as 687347116096 + 615856105225 = 829064^2 + 784765^2 .

It is not a de Polignac number, because 1303203221321 - 2¹⁴ = 1303203204937 is a prime.

It is a super-2 number, since 2×1303203221321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1303203221381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3327716 + ... + 3698661.

It is an arithmetic number, because the mean of its divisors is an integer number (112797959223).

Almost surely, 2^{1303203221321} is an apocalyptic number.

It is an amenable number.

1303203221321 is a deficient number, since it is larger than the sum of its proper divisors (50372289355).

1303203221321 is an equidigital number, since it uses as much as digits as its factorization.

1303203221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7026632 (or 7026601 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1303203221321 its reverse (1231223023031), we get a palindrome (2534426244352).

The spelling of 1303203221321 in words is "one trillion, three hundred three billion, two hundred three million, two hundred twenty-one thousand, three hundred twenty-one".