1321303001 has 4 divisors (see below), whose sum is σ = 1330053504. Its totient is φ = 1312552500.

The previous prime is 1321302991. The next prime is 1321303007. The reversal of 1321303001 is 1003031231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1321303001 - 2⁶ = 1321302937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321303007) 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, 4375025 + ... + 4375326.

It is an arithmetic number, because the mean of its divisors is an integer number (332513376).

Almost surely, 2^1321303001 is an apocalyptic number.

It is an amenable number.

1321303001 is a deficient number, since it is larger than the sum of its proper divisors (8750503).

1321303001 is an equidigital number, since it uses as much as digits as its factorization.

1321303001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8750502.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1321303001 is about 36349.7317871810. The cubic root of 1321303001 is about 1097.3221366559.

Adding to 1321303001 its reverse (1003031231), we get a palindrome (2324334232).

The spelling of 1321303001 in words is "one billion, three hundred twenty-one million, three hundred three thousand, one".