135420031431123 has 32 divisors (see below), whose sum is σ = 183144587250240. Its totient is φ = 88995177431040.

The previous prime is 135420031431109. The next prime is 135420031431169. The reversal of 135420031431123 is 321134130024531.

It is not a de Polignac number, because 135420031431123 - 2¹³ = 135420031422931 is a prime.

It is a super-2 number, since 2×135420031431123² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135420031431193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1169685583 + ... + 1169801351.

It is an arithmetic number, because the mean of its divisors is an integer number (5723268351570).

Almost surely, 2^{135420031431123} is an apocalyptic number.

135420031431123 is a deficient number, since it is larger than the sum of its proper divisors (47724555819117).

135420031431123 is a wasteful number, since it uses less digits than its factorization.

135420031431123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131767.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 135420031431123 its reverse (321134130024531), we get a palindrome (456554161455654).

The spelling of 135420031431123 in words is "one hundred thirty-five trillion, four hundred twenty billion, thirty-one million, four hundred thirty-one thousand, one hundred twenty-three".