123102012018 has 32 divisors (see below), whose sum is σ = 252428323392. Its totient is φ = 39998361600.

The previous prime is 123102012017. The next prime is 123102012037. The reversal of 123102012018 is 810210201321.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123102011985 and 123102012003.

It is not an unprimeable number, because it can be changed into a prime (123102012017) by changing a digit.

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, 66633 + ... + 500643.

It is an arithmetic number, because the mean of its divisors is an integer number (7888385106).

Almost surely, 2^123102012018 is an apocalyptic number.

123102012018 is an abundant number, since it is smaller than the sum of its proper divisors (129326311374).

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

123102012018 is a wasteful number, since it uses less digits than its factorization.

123102012018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435210.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 123102012018 its reverse (810210201321), we get a palindrome (933312213339).

The spelling of 123102012018 in words is "one hundred twenty-three billion, one hundred two million, twelve thousand, eighteen".