135413512123 has 2 divisors, whose sum is σ = 135413512124. Its totient is φ = 135413512122.

The previous prime is 135413512103. The next prime is 135413512147. The reversal of 135413512123 is 321215314531.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135413512123 is a prime.

It is not a weakly prime, because it can be changed into another prime (135413512103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67706756061 + 67706756062.

It is an arithmetic number, because the mean of its divisors is an integer number (67706756062).

Almost surely, 2^135413512123 is an apocalyptic number.

135413512123 is a deficient number, since it is larger than the sum of its proper divisors (1).

135413512123 is an equidigital number, since it uses as much as digits as its factorization.

135413512123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

Adding to 135413512123 its reverse (321215314531), we get a palindrome (456628826654).

The spelling of 135413512123 in words is "one hundred thirty-five billion, four hundred thirteen million, five hundred twelve thousand, one hundred twenty-three".