12123022212 has 36 divisors (see below), whose sum is σ = 35022064896. Its totient is φ = 3463720560.

The previous prime is 12123022187. The next prime is 12123022217. The reversal of 12123022212 is 21222032121.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (12123022217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24053364 + ... + 24053867.

It is an arithmetic number, because the mean of its divisors is an integer number (972835136).

Almost surely, 2^12123022212 is an apocalyptic number.

12123022212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12123022212 is an abundant number, since it is smaller than the sum of its proper divisors (22899042684).

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

12123022212 is a wasteful number, since it uses less digits than its factorization.

12123022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48107248 (or 48107243 counting only the distinct ones).

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

Adding to 12123022212 its reverse (21222032121), we get a palindrome (33345054333).

Subtracting 12123022212 from its reverse (21222032121), we obtain a palindrome (9099009909).

The spelling of 12123022212 in words is "twelve billion, one hundred twenty-three million, twenty-two thousand, two hundred twelve".