312000012 has 30 divisors (see below), whose sum is σ = 815630508. Its totient is φ = 103999896.

The previous prime is 311999999. The next prime is 312000019. The reversal of 312000012 is 210000213.

It is a happy number.

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 = 311999958 and 312000003.

It is not an unprimeable number, because it can be changed into a prime (312000019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 481158 + ... + 481805.

Almost surely, 2^312000012 is an apocalyptic number.

It is an amenable number.

312000012 is an abundant number, since it is smaller than the sum of its proper divisors (503630496).

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

312000012 is a wasteful number, since it uses less digits than its factorization.

312000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962979 (or 962968 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 312000012 is about 17663.5220723388. The cubic root of 312000012 is about 678.2422972982.

Adding to 312000012 its reverse (210000213), we get a palindrome (522000225).

The spelling of 312000012 in words is "three hundred twelve million, twelve", and thus it is an aban number.