123135343151121 has 48 divisors (see below), whose sum is σ = 203810774993280. Its totient is φ = 70176253340160.

The previous prime is 123135343151089. The next prime is 123135343151221. The reversal of 123135343151121 is 121151343531321.

123135343151121 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 3 + 53 + 431 + 51 + 121 = 666.

It is not a de Polignac number, because 123135343151121 - 2⁵ = 123135343151089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123135343151221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299049241 + ... + 299460713.

It is an arithmetic number, because the mean of its divisors is an integer number (4246057812360).

Almost surely, 2^{123135343151121} is an apocalyptic number.

It is an amenable number.

123135343151121 is a deficient number, since it is larger than the sum of its proper divisors (80675431842159).

123135343151121 is a wasteful number, since it uses less digits than its factorization.

123135343151121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424086 (or 424083 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

Adding to 123135343151121 its reverse (121151343531321), we get a palindrome (244286686682442).

The spelling of 123135343151121 in words is "one hundred twenty-three trillion, one hundred thirty-five billion, three hundred forty-three million, one hundred fifty-one thousand, one hundred twenty-one".