12122223320 has 64 divisors (see below), whose sum is σ = 28919488320. Its totient is φ = 4557328384.

The previous prime is 12122223287. The next prime is 12122223331. The reversal of 12122223320 is 2332222121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12122223292 and 12122223301.

It is a congruent number.

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, 493244 + ... + 517236.

It is an arithmetic number, because the mean of its divisors is an integer number (451867005).

Almost surely, 2^12122223320 is an apocalyptic number.

12122223320 is a gapful number since it is divisible by the number (10) 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 12122223320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14459744160).

12122223320 is an abundant number, since it is smaller than the sum of its proper divisors (16797265000).

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

12122223320 is a wasteful number, since it uses less digits than its factorization.

12122223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24764 (or 24760 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12122223320 its reverse (2332222121), we get a palindrome (14454445441).

The spelling of 12122223320 in words is "twelve billion, one hundred twenty-two million, two hundred twenty-three thousand, three hundred twenty".