135411352123 has 4 divisors (see below), whose sum is σ = 139779460288. Its totient is φ = 131043243960.

The previous prime is 135411352121. The next prime is 135411352133. The reversal of 135411352123 is 321253114531.

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 135411352123 - 2¹ = 135411352121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 4368108133 = 135411352123 / (1 + 3 + 5 + 4 + 1 + 1 + 3 + 5 + 2 + 1 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (135411352121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2184054036 + ... + 2184054097.

It is an arithmetic number, because the mean of its divisors is an integer number (34944865072).

Almost surely, 2^135411352123 is an apocalyptic number.

135411352123 is a deficient number, since it is larger than the sum of its proper divisors (4368108165).

135411352123 is an equidigital number, since it uses as much as digits as its factorization.

135411352123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368108164.

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

Adding to 135411352123 its reverse (321253114531), we get a palindrome (456664466654).

The spelling of 135411352123 in words is "one hundred thirty-five billion, four hundred eleven million, three hundred fifty-two thousand, one hundred twenty-three".