1312310120403 has 4 divisors (see below), whose sum is σ = 1749746827208. Its totient is φ = 874873413600.

The previous prime is 1312310120389. The next prime is 1312310120419. The reversal of 1312310120403 is 3040210132131.

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

It is not a de Polignac number, because 1312310120403 - 2⁶ = 1312310120339 is a prime.

It is a super-2 number, since 2×1312310120403² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312310120403.

It is not an unprimeable number, because it can be changed into a prime (1312310120453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218718353398 + ... + 218718353403.

It is an arithmetic number, because the mean of its divisors is an integer number (437436706802).

Almost surely, 2^{1312310120403} is an apocalyptic number.

1312310120403 is a deficient number, since it is larger than the sum of its proper divisors (437436706805).

1312310120403 is an equidigital number, since it uses as much as digits as its factorization.

1312310120403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437436706804.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1312310120403 its reverse (3040210132131), we get a palindrome (4352520252534).

The spelling of 1312310120403 in words is "one trillion, three hundred twelve billion, three hundred ten million, one hundred twenty thousand, four hundred three".