1321322320033 has 4 divisors (see below), whose sum is σ = 1321326409860. Its totient is φ = 1321318230208.

The previous prime is 1321322320013. The next prime is 1321322320051. The reversal of 1321322320033 is 3300232231231.

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 664342365184 + 656979954849 = 815072^2 + 810543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321322320033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321322320013) 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, 1514428 + ... + 2221741.

It is an arithmetic number, because the mean of its divisors is an integer number (330331602465).

Almost surely, 2^{1321322320033} is an apocalyptic number.

It is an amenable number.

1321322320033 is a deficient number, since it is larger than the sum of its proper divisors (4089827).

1321322320033 is an equidigital number, since it uses as much as digits as its factorization.

1321322320033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089826.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 1321322320033 its reverse (3300232231231), we get a palindrome (4621554551264).

The spelling of 1321322320033 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-two million, three hundred twenty thousand, thirty-three".