12321323212 has 24 divisors (see below), whose sum is σ = 23525877312. Its totient is φ = 5599803600.

The previous prime is 12321323159. The next prime is 12321323297. The reversal of 12321323212 is 21232312321.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 384603 + ... + 415405.

It is an arithmetic number, because the mean of its divisors is an integer number (980244888).

Almost surely, 2^12321323212 is an apocalyptic number.

It is an amenable number.

12321323212 is a deficient number, since it is larger than the sum of its proper divisors (11204554100).

12321323212 is a wasteful number, since it uses less digits than its factorization.

12321323212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39909 (or 39907 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 12321323212 its reverse (21232312321), we get a palindrome (33553635533).

It can be divided in two parts, 12321 and 323212, that added together give a palindrome (335533).

The spelling of 12321323212 in words is "twelve billion, three hundred twenty-one million, three hundred twenty-three thousand, two hundred twelve".