123120012 has 24 divisors (see below), whose sum is σ = 299771136. Its totient is φ = 39255568.

The previous prime is 123119963. The next prime is 123120013. The reversal of 123120012 is 210021321.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 123120012.

It is not an unprimeable number, because it can be changed into a prime (123120013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222768 + ... + 223319.

It is an arithmetic number, because the mean of its divisors is an integer number (12490464).

Almost surely, 2^123120012 is an apocalyptic number.

123120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123120012 is an abundant number, since it is smaller than the sum of its proper divisors (176651124).

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

123120012 is a wasteful number, since it uses less digits than its factorization.

123120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446117 (or 446115 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 123120012 is about 11095.9457460822. The cubic root of 123120012 is about 497.4806766734.

Adding to 123120012 its reverse (210021321), we get a palindrome (333141333).

The spelling of 123120012 in words is "one hundred twenty-three million, one hundred twenty thousand, twelve".