312120312 has 32 divisors (see below), whose sum is σ = 891772800. Its totient is φ = 89177184.

The previous prime is 312120311. The next prime is 312120313. The reversal of 312120312 is 213021213.

It is an interprime number because it is at equal distance from previous prime (312120311) and next prime (312120313).

It is a junction number, because it is equal to n+sod(n) for n = 312120291 and 312120300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312120311) 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, 928762 + ... + 929097.

It is an arithmetic number, because the mean of its divisors is an integer number (27867900).

Almost surely, 2^312120312 is an apocalyptic number.

It is an amenable number.

312120312 is an abundant number, since it is smaller than the sum of its proper divisors (579652488).

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

312120312 is a wasteful number, since it uses less digits than its factorization.

312120312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857875 (or 1857871 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 312120312 is about 17666.9270672633. The cubic root of 312120312 is about 678.3294576195.

Adding to 312120312 its reverse (213021213), we get a palindrome (525141525).

Subtracting from 312120312 its reverse (213021213), we obtain a palindrome (99099099).

The spelling of 312120312 in words is "three hundred twelve million, one hundred twenty thousand, three hundred twelve".