123123242040 has 64 divisors (see below), whose sum is σ = 369419443200. Its totient is φ = 32828445312.

The previous prime is 123123242017. The next prime is 123123242063. The reversal of 123123242040 is 40242321321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123123242017) and next prime (123123242063).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 123123242040.

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 15 ways as a sum of consecutive naturals, for example, 880369 + ... + 1010591.

It is an arithmetic number, because the mean of its divisors is an integer number (5772178800).

Almost surely, 2^123123242040 is an apocalyptic number.

123123242040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123123242040 is an abundant number, since it is smaller than the sum of its proper divisors (246296201160).

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

123123242040 is a wasteful number, since it uses less digits than its factorization.

123123242040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138116 (or 138112 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 123123242040 its reverse (40242321321), we get a palindrome (163365563361).

The spelling of 123123242040 in words is "one hundred twenty-three billion, one hundred twenty-three million, two hundred forty-two thousand, forty".