123378840123 has 32 divisors (see below), whose sum is σ = 210099681792. Its totient is φ = 62529657600.

The previous prime is 123378840113. The next prime is 123378840163. The reversal of 123378840123 is 321048873321.

It is a happy number.

It is not a de Polignac number, because 123378840123 - 2⁴ = 123378840107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123378840113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6504036 + ... + 6522977.

It is an arithmetic number, because the mean of its divisors is an integer number (6565615056).

Almost surely, 2^123378840123 is an apocalyptic number.

123378840123 is a deficient number, since it is larger than the sum of its proper divisors (86720841669).

123378840123 is a wasteful number, since it uses less digits than its factorization.

123378840123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13027075.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 123378840123 in words is "one hundred twenty-three billion, three hundred seventy-eight million, eight hundred forty thousand, one hundred twenty-three".