1311423440123 has 2 divisors, whose sum is σ = 1311423440124. Its totient is φ = 1311423440122.

The previous prime is 1311423440021. The next prime is 1311423440141. The reversal of 1311423440123 is 3210443241131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311423440123 - 2²⁰ = 1311422391547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311423440623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655711720061 + 655711720062.

It is an arithmetic number, because the mean of its divisors is an integer number (655711720062).

Almost surely, 2^{1311423440123} is an apocalyptic number.

1311423440123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311423440123 is an equidigital number, since it uses as much as digits as its factorization.

1311423440123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 1311423440123 its reverse (3210443241131), we get a palindrome (4521866681254).

The spelling of 1311423440123 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, four hundred forty thousand, one hundred twenty-three".