12021222212 has 24 divisors (see below), whose sum is σ = 21104498520. Its totient is φ = 5991390720.

The previous prime is 12021222163. The next prime is 12021222217. The reversal of 12021222212 is 21222212021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 169416256 + 11851805956 = 13016^2 + 108866^2 .

It is not an unprimeable number, because it can be changed into a prime (12021222217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2875868 + ... + 2880044.

It is an arithmetic number, because the mean of its divisors is an integer number (879354105).

Almost surely, 2^12021222212 is an apocalyptic number.

It is an amenable number.

12021222212 is a deficient number, since it is larger than the sum of its proper divisors (9083276308).

12021222212 is a wasteful number, since it uses less digits than its factorization.

12021222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6311 (or 6309 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12021222212 its reverse (21222212021), we get a palindrome (33243434233).

The spelling of 12021222212 in words is "twelve billion, twenty-one million, two hundred twenty-two thousand, two hundred twelve".