1312331333123 has 4 divisors (see below), whose sum is σ = 1328142554088. Its totient is φ = 1296520112160.

The previous prime is 1312331333057. The next prime is 1312331333129. The reversal of 1312331333123 is 3213331332131.

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 1312331333123 - 2⁸ = 1312331332867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312331333129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7905610358 + ... + 7905610523.

It is an arithmetic number, because the mean of its divisors is an integer number (332035638522).

Almost surely, 2^{1312331333123} is an apocalyptic number.

1312331333123 is a deficient number, since it is larger than the sum of its proper divisors (15811220965).

1312331333123 is an equidigital number, since it uses as much as digits as its factorization.

1312331333123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15811220964.

The product of its digits is 8748, while the sum is 29.

Adding to 1312331333123 its reverse (3213331332131), we get a palindrome (4525662665254).

The spelling of 1312331333123 in words is "one trillion, three hundred twelve billion, three hundred thirty-one million, three hundred thirty-three thousand, one hundred twenty-three".