12001223212 has 12 divisors (see below), whose sum is σ = 22911426216. Its totient is φ = 5455101440.

The previous prime is 12001223203. The next prime is 12001223237. The reversal of 12001223212 is 21232210021.

It is a happy 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, 136377493 + ... + 136377580.

It is an arithmetic number, because the mean of its divisors is an integer number (1909285518).

Almost surely, 2^12001223212 is an apocalyptic number.

It is an amenable number.

12001223212 is a deficient number, since it is larger than the sum of its proper divisors (10910203004).

12001223212 is a wasteful number, since it uses less digits than its factorization.

12001223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272755088 (or 272755086 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12001223212 its reverse (21232210021), we get a palindrome (33233433233).

The spelling of 12001223212 in words is "twelve billion, one million, two hundred twenty-three thousand, two hundred twelve".