123120031135 has 16 divisors (see below), whose sum is σ = 155119845600. Its totient is φ = 93680205696.

The previous prime is 123120031129. The next prime is 123120031171. The reversal of 123120031135 is 531130021321.

It is a cyclic number.

It is not a de Polignac number, because 123120031135 - 2⁹ = 123120030623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6326880 + ... + 6346309.

It is an arithmetic number, because the mean of its divisors is an integer number (9694990350).

Almost surely, 2^123120031135 is an apocalyptic number.

123120031135 is a deficient number, since it is larger than the sum of its proper divisors (31999814465).

123120031135 is a wasteful number, since it uses less digits than its factorization.

123120031135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12673290.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 123120031135 its reverse (531130021321), we get a palindrome (654250052456).

The spelling of 123120031135 in words is "one hundred twenty-three billion, one hundred twenty million, thirty-one thousand, one hundred thirty-five".