12222030312 has 96 divisors (see below), whose sum is σ = 33632988480. Its totient is φ = 4008802560.

The previous prime is 12222030277. The next prime is 12222030319. The reversal of 12222030312 is 21303022221.

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 (12222030319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2998708 + ... + 3002780.

It is an arithmetic number, because the mean of its divisors is an integer number (350343630).

Almost surely, 2^12222030312 is an apocalyptic number.

12222030312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12222030312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16816494240).

12222030312 is an abundant number, since it is smaller than the sum of its proper divisors (21410958168).

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

12222030312 is a wasteful number, since it uses less digits than its factorization.

12222030312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743 (or 4736 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 12222030312 its reverse (21303022221), we get a palindrome (33525052533).

The spelling of 12222030312 in words is "twelve billion, two hundred twenty-two million, thirty thousand, three hundred twelve".