1312223303123 has 4 divisors (see below), whose sum is σ = 1347688797840. Its totient is φ = 1276757808408.

The previous prime is 1312223303077. The next prime is 1312223303147. The reversal of 1312223303123 is 3213033222131.

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-1312223303123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312223303092 and 1312223303101.

It is not an unprimeable number, because it can be changed into a prime (1312223303623) 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, 17732747303 + ... + 17732747376.

It is an arithmetic number, because the mean of its divisors is an integer number (336922199460).

Almost surely, 2^{1312223303123} is an apocalyptic number.

1312223303123 is a deficient number, since it is larger than the sum of its proper divisors (35465494717).

1312223303123 is an equidigital number, since it uses as much as digits as its factorization.

1312223303123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35465494716.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1312223303123 its reverse (3213033222131), we get a palindrome (4525256525254).

The spelling of 1312223303123 in words is "one trillion, three hundred twelve billion, two hundred twenty-three million, three hundred three thousand, one hundred twenty-three".