123140134142 has 16 divisors (see below), whose sum is σ = 186966783360. Its totient is φ = 60818120472.

The previous prime is 123140134123. The next prime is 123140134147. The reversal of 123140134142 is 241431041321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123140134147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990959 + ... + 1108277.

It is an arithmetic number, because the mean of its divisors is an integer number (11685423960).

Almost surely, 2^123140134142 is an apocalyptic number.

123140134142 is a deficient number, since it is larger than the sum of its proper divisors (63826649218).

123140134142 is a wasteful number, since it uses less digits than its factorization.

123140134142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123727.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 123140134142 its reverse (241431041321), we get a palindrome (364571175463).

The spelling of 123140134142 in words is "one hundred twenty-three billion, one hundred forty million, one hundred thirty-four thousand, one hundred forty-two".