123120042534 has 24 divisors (see below), whose sum is σ = 267935255640. Its totient is φ = 40859219808.

The previous prime is 123120042527. The next prime is 123120042569. The reversal of 123120042534 is 435240021321.

123120042534 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 200 + 425 + 34 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 123120042498 and 123120042507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15061999 + ... + 15070170.

It is an arithmetic number, because the mean of its divisors is an integer number (11163968985).

Almost surely, 2^123120042534 is an apocalyptic number.

123120042534 is an abundant number, since it is smaller than the sum of its proper divisors (144815213106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123120042534 is a wasteful number, since it uses less digits than its factorization.

123120042534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30132404 (or 30132401 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 123120042534 its reverse (435240021321), we get a palindrome (558360063855).

The spelling of 123120042534 in words is "one hundred twenty-three billion, one hundred twenty million, forty-two thousand, five hundred thirty-four".