1212320312 has 32 divisors (see below), whose sum is σ = 2600289120. Its totient is φ = 519073920.

The previous prime is 1212320309. The next prime is 1212320341. The reversal of 1212320312 is 2130232121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52862 + ... + 72242.

It is an arithmetic number, because the mean of its divisors is an integer number (81259035).

Almost surely, 2^1212320312 is an apocalyptic number.

It is an amenable number.

1212320312 is an abundant number, since it is smaller than the sum of its proper divisors (1387968808).

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

1212320312 is a wasteful number, since it uses less digits than its factorization.

1212320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20511 (or 20507 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1212320312 is about 34818.3904280482. The cubic root of 1212320312 is about 1066.2829394903.

Adding to 1212320312 its reverse (2130232121), we get a palindrome (3342552433).

The spelling of 1212320312 in words is "one billion, two hundred twelve million, three hundred twenty thousand, three hundred twelve".