12230221212 has 48 divisors (see below), whose sum is σ = 34590528000. Its totient is φ = 3706127280.

The previous prime is 12230221187. The next prime is 12230221219. The reversal of 12230221212 is 21212203221.

12230221212 is a `hidden beast` number, since 1 + 2 + 230 + 221 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12230221219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5146212 + ... + 5148587.

It is an arithmetic number, because the mean of its divisors is an integer number (720636000).

Almost surely, 2^12230221212 is an apocalyptic number.

12230221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12230221212 is an abundant number, since it is smaller than the sum of its proper divisors (22360306788).

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

12230221212 is a wasteful number, since it uses less digits than its factorization.

12230221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10294823 (or 10294815 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12230221212 its reverse (21212203221), we get a palindrome (33442424433).

The spelling of 12230221212 in words is "twelve billion, two hundred thirty million, two hundred twenty-one thousand, two hundred twelve".