123134111121 has 16 divisors (see below), whose sum is σ = 189454613504. Its totient is φ = 69679218384.

The previous prime is 123134111117. The next prime is 123134111137. The reversal of 123134111121 is 121111431321.

It is a happy number.

It is not a de Polignac number, because 123134111121 - 2² = 123134111117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123134211121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28461571 + ... + 28465896.

It is an arithmetic number, because the mean of its divisors is an integer number (11840913344).

Almost surely, 2^123134111121 is an apocalyptic number.

It is an amenable number.

123134111121 is a deficient number, since it is larger than the sum of its proper divisors (66320502383).

123134111121 is a wasteful number, since it uses less digits than its factorization.

123134111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56927580.

The product of its digits is 144, while the sum is 21.

Adding to 123134111121 its reverse (121111431321), we get a palindrome (244245542442).

The spelling of 123134111121 in words is "one hundred twenty-three billion, one hundred thirty-four million, one hundred eleven thousand, one hundred twenty-one".