12312123212 has 6 divisors (see below), whose sum is σ = 21546215628. Its totient is φ = 6156061604.

The previous prime is 12312123209. The next prime is 12312123233. The reversal of 12312123212 is 21232121321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1539015398 + ... + 1539015405.

It is an arithmetic number, because the mean of its divisors is an integer number (3591035938).

Almost surely, 2^12312123212 is an apocalyptic number.

It is an amenable number.

12312123212 is a deficient number, since it is larger than the sum of its proper divisors (9234092416).

12312123212 is a wasteful number, since it uses less digits than its factorization.

12312123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078030807 (or 3078030805 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 12312123212 its reverse (21232121321), we get a palindrome (33544244533).

The spelling of 12312123212 in words is "twelve billion, three hundred twelve million, one hundred twenty-three thousand, two hundred twelve".