123105131124 has 12 divisors (see below), whose sum is σ = 287245305984. Its totient is φ = 41035043704.

The previous prime is 123105131099. The next prime is 123105131137. The reversal of 123105131124 is 421131501321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 123105131094 and 123105131103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5129380452 + ... + 5129380475.

It is an arithmetic number, because the mean of its divisors is an integer number (23937108832).

Almost surely, 2^123105131124 is an apocalyptic number.

It is an amenable number.

123105131124 is an abundant number, since it is smaller than the sum of its proper divisors (164140174860).

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

123105131124 is a wasteful number, since it uses less digits than its factorization.

123105131124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258760934 (or 10258760932 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 123105131124 its reverse (421131501321), we get a palindrome (544236632445).

The spelling of 123105131124 in words is "one hundred twenty-three billion, one hundred five million, one hundred thirty-one thousand, one hundred twenty-four".