1321320111233 has 4 divisors (see below), whose sum is σ = 1324371659268. Its totient is φ = 1318268563200.

The previous prime is 1321320111211. The next prime is 1321320111299. The reversal of 1321320111233 is 3321110231231.

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 710121379969 + 611198731264 = 842687^2 + 781792^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321320111233 - 2¹⁴ = 1321320094849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321320111199 and 1321320111208.

It is not an unprimeable number, because it can be changed into a prime (1321320111533) 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, 1525773368 + ... + 1525774233.

It is an arithmetic number, because the mean of its divisors is an integer number (331092914817).

Almost surely, 2^{1321320111233} is an apocalyptic number.

It is an amenable number.

1321320111233 is a deficient number, since it is larger than the sum of its proper divisors (3051548035).

1321320111233 is an equidigital number, since it uses as much as digits as its factorization.

1321320111233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051548034.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1321320111233 its reverse (3321110231231), we get a palindrome (4642430342464).

The spelling of 1321320111233 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, one hundred eleven thousand, two hundred thirty-three".