1223812312 has 16 divisors (see below), whose sum is σ = 2296297800. Its totient is φ = 611466240.

The previous prime is 1223812307. The next prime is 1223812339. The reversal of 1223812312 is 2132183221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43014 + ... + 65557.

Almost surely, 2^1223812312 is an apocalyptic number.

It is an amenable number.

1223812312 is a deficient number, since it is larger than the sum of its proper divisors (1072485488).

1223812312 is a wasteful number, since it uses less digits than its factorization.

1223812312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109986 (or 109982 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 1223812312 is about 34983.0289140320. The cubic root of 1223812312 is about 1069.6415697587.

Adding to 1223812312 its reverse (2132183221), we get a palindrome (3355995533).

The spelling of 1223812312 in words is "one billion, two hundred twenty-three million, eight hundred twelve thousand, three hundred twelve".