1212630312 has 32 divisors (see below), whose sum is σ = 3191133600. Its totient is φ = 382935744.

The previous prime is 1212630299. The next prime is 1212630323. The reversal of 1212630312 is 2130362121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329183 + ... + 1330094.

It is an arithmetic number, because the mean of its divisors is an integer number (99722925).

Almost surely, 2^1212630312 is an apocalyptic number.

1212630312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212630312 is an abundant number, since it is smaller than the sum of its proper divisors (1978503288).

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

1212630312 is a wasteful number, since it uses less digits than its factorization.

1212630312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659305 (or 2659301 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1212630312 is about 34822.8418139588. The cubic root of 1212630312 is about 1066.3738174366.

Adding to 1212630312 its reverse (2130362121), we get a palindrome (3342992433).

The spelling of 1212630312 in words is "one billion, two hundred twelve million, six hundred thirty thousand, three hundred twelve".