312212120 has 64 divisors (see below), whose sum is σ = 799683840. Its totient is φ = 108592000.

The previous prime is 312212119. The next prime is 312212137. The reversal of 312212120 is 21212213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 312212095 and 312212104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5306 + ... + 25545.

It is an arithmetic number, because the mean of its divisors is an integer number (12495060).

Almost surely, 2^312212120 is an apocalyptic number.

It is an amenable number.

312212120 is an abundant number, since it is smaller than the sum of its proper divisors (487471720).

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

312212120 is a wasteful number, since it uses less digits than its factorization.

312212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30896 (or 30892 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 312212120 is about 17669.5251775479. The cubic root of 312212120 is about 678.3959597166.

Adding to 312212120 its reverse (21212213), we get a palindrome (333424333).

The spelling of 312212120 in words is "three hundred twelve million, two hundred twelve thousand, one hundred twenty".