123140135152 has 40 divisors (see below), whose sum is σ = 241653104640. Its totient is φ = 60778361280.

The previous prime is 123140135123. The next prime is 123140135189. The reversal of 123140135152 is 251531041321.

It is a self number, because there is not a number n which added to its sum of digits gives 123140135152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11763873 + ... + 11774335.

It is an arithmetic number, because the mean of its divisors is an integer number (6041327616).

Almost surely, 2^123140135152 is an apocalyptic number.

It is an amenable number.

123140135152 is a deficient number, since it is larger than the sum of its proper divisors (118512969488).

123140135152 is a wasteful number, since it uses less digits than its factorization.

123140135152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19861 (or 19855 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 123140135152 its reverse (251531041321), we get a palindrome (374671176473).

The spelling of 123140135152 in words is "one hundred twenty-three billion, one hundred forty million, one hundred thirty-five thousand, one hundred fifty-two".