135225316123 has 4 divisors (see below), whose sum is σ = 135706545288. Its totient is φ = 134744086960.

The previous prime is 135225316097. The next prime is 135225316151. The reversal of 135225316123 is 321613522531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321613522531 = 7 ⋅45944788933.

It is a cyclic number.

It is not a de Polignac number, because 135225316123 - 2²¹ = 135223218971 is a prime.

It is a super-2 number, since 2×135225316123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135225316153) 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, 240614161 + ... + 240614722.

It is an arithmetic number, because the mean of its divisors is an integer number (33926636322).

Almost surely, 2^135225316123 is an apocalyptic number.

135225316123 is a deficient number, since it is larger than the sum of its proper divisors (481229165).

135225316123 is an equidigital number, since it uses as much as digits as its factorization.

135225316123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481229164.

The product of its digits is 32400, while the sum is 34.

Adding to 135225316123 its reverse (321613522531), we get a palindrome (456838838654).

The spelling of 135225316123 in words is "one hundred thirty-five billion, two hundred twenty-five million, three hundred sixteen thousand, one hundred twenty-three".