1312003231243 has 4 divisors (see below), whose sum is σ = 1316739705280. Its totient is φ = 1307266757208.

The previous prime is 1312003231241. The next prime is 1312003231313. The reversal of 1312003231243 is 3421323002131.

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 1312003231243 - 2¹ = 1312003231241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312003231241) 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, 2368236603 + ... + 2368237156.

It is an arithmetic number, because the mean of its divisors is an integer number (329184926320).

Almost surely, 2^{1312003231243} is an apocalyptic number.

1312003231243 is a deficient number, since it is larger than the sum of its proper divisors (4736474037).

1312003231243 is an equidigital number, since it uses as much as digits as its factorization.

1312003231243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736474036.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1312003231243 its reverse (3421323002131), we get a palindrome (4733326233374).

The spelling of 1312003231243 in words is "one trillion, three hundred twelve billion, three million, two hundred thirty-one thousand, two hundred forty-three".