12120012 has 18 divisors (see below), whose sum is σ = 30636788. Its totient is φ = 4039992.

The previous prime is 12120001. The next prime is 12120019. The reversal of 12120012 is 21002121.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12119976 and 12120003.

It is not an unprimeable number, because it can be changed into a prime (12120019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168298 + ... + 168369.

Almost surely, 2^12120012 is an apocalyptic number.

12120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12120012 is an abundant number, since it is smaller than the sum of its proper divisors (18516776).

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

12120012 is a wasteful number, since it uses less digits than its factorization.

12120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336677 (or 336672 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 12120012 is about 3481.3807605604. The cubic root of 12120012 is about 229.7035373781.

Adding to 12120012 its reverse (21002121), we get a palindrome (33122133).

The spelling of 12120012 in words is "twelve million, one hundred twenty thousand, twelve".