1320321134243 has 4 divisors (see below), whose sum is σ = 1321686513840. Its totient is φ = 1318955754648.

The previous prime is 1320321134239. The next prime is 1320321134273. The reversal of 1320321134243 is 3424311230231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320321134243 - 2² = 1320321134239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320321134273) 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, 682688348 + ... + 682690281.

It is an arithmetic number, because the mean of its divisors is an integer number (330421628460).

Almost surely, 2^{1320321134243} is an apocalyptic number.

1320321134243 is a deficient number, since it is larger than the sum of its proper divisors (1365379597).

1320321134243 is an equidigital number, since it uses as much as digits as its factorization.

1320321134243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365379596.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 1320321134243 its reverse (3424311230231), we get a palindrome (4744632364474).

The spelling of 1320321134243 in words is "one trillion, three hundred twenty billion, three hundred twenty-one million, one hundred thirty-four thousand, two hundred forty-three".