1313231203123 has 4 divisors (see below), whose sum is σ = 1500835660720. Its totient is φ = 1125626745528.

The previous prime is 1313231203073. The next prime is 1313231203127. The reversal of 1313231203123 is 3213021323131.

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 1313231203123 - 2²¹ = 1313229105971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313231203127) 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, 93802228788 + ... + 93802228801.

It is an arithmetic number, because the mean of its divisors is an integer number (375208915180).

Almost surely, 2^{1313231203123} is an apocalyptic number.

1313231203123 is a deficient number, since it is larger than the sum of its proper divisors (187604457597).

1313231203123 is an equidigital number, since it uses as much as digits as its factorization.

1313231203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187604457596.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1313231203123 its reverse (3213021323131), we get a palindrome (4526252526254).

The spelling of 1313231203123 in words is "one trillion, three hundred thirteen billion, two hundred thirty-one million, two hundred three thousand, one hundred twenty-three".