12021203212 has 24 divisors (see below), whose sum is σ = 21256909520. Its totient is φ = 5947940160.

The previous prime is 12021203203. The next prime is 12021203231. The reversal of 12021203212 is 21230212021.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336598 + ... + 370594.

Almost surely, 2^12021203212 is an apocalyptic number.

It is an amenable number.

12021203212 is a deficient number, since it is larger than the sum of its proper divisors (9235706308).

12021203212 is a wasteful number, since it uses less digits than its factorization.

12021203212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34921 (or 34919 counting only the distinct ones).

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

Adding to 12021203212 its reverse (21230212021), we get a palindrome (33251415233).

The spelling of 12021203212 in words is "twelve billion, twenty-one million, two hundred three thousand, two hundred twelve".