1312130203123 has 4 divisors (see below), whose sum is σ = 1312163958160. Its totient is φ = 1312096448088.

The previous prime is 1312130203099. The next prime is 1312130203151. The reversal of 1312130203123 is 3213020312131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312130203123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312130203094 and 1312130203103.

It is not an unprimeable number, because it can be changed into a prime (1312130303123) 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, 16819143 + ... + 16896976.

It is an arithmetic number, because the mean of its divisors is an integer number (328040989540).

Almost surely, 2^{1312130203123} is an apocalyptic number.

1312130203123 is a deficient number, since it is larger than the sum of its proper divisors (33755037).

1312130203123 is an equidigital number, since it uses as much as digits as its factorization.

1312130203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33755036.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1312130203123 its reverse (3213020312131), we get a palindrome (4525150515254).

The spelling of 1312130203123 in words is "one trillion, three hundred twelve billion, one hundred thirty million, two hundred three thousand, one hundred twenty-three".