12001222212 has 48 divisors (see below), whose sum is σ = 32042142720. Its totient is φ = 3424754592.

The previous prime is 12001222193. The next prime is 12001222223. The reversal of 12001222212 is 21222210021.

It is a junction number, because it is equal to n+sod(n) for n = 12001222191 and 12001222200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16912 + ... + 155847.

It is an arithmetic number, because the mean of its divisors is an integer number (667544640).

Almost surely, 2^12001222212 is an apocalyptic number.

12001222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12001222212 is an abundant number, since it is smaller than the sum of its proper divisors (20040920508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12001222212 is a wasteful number, since it uses less digits than its factorization.

12001222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173600 (or 173598 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12001222212 its reverse (21222210021), we get a palindrome (33223432233).

The spelling of 12001222212 in words is "twelve billion, one million, two hundred twenty-two thousand, two hundred twelve".