12122012222220 has 96 divisors (see below), whose sum is σ = 34615922443200. Its totient is φ = 3168438174720.

The previous prime is 12122012222213. The next prime is 12122012222321. The reversal of 12122012222220 is 2222221022121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1380006 + ... + 5113554.

It is an arithmetic number, because the mean of its divisors is an integer number (360582525450).

Almost surely, 2^{12122012222220} is an apocalyptic number.

12122012222220 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 12122012222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17307961221600).

12122012222220 is an abundant number, since it is smaller than the sum of its proper divisors (22493910220980).

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

12122012222220 is a wasteful number, since it uses less digits than its factorization.

12122012222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3734635 (or 3734633 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12122012222220 its reverse (2222221022121), we get a palindrome (14344233244341).

The spelling of 12122012222220 in words is "twelve trillion, one hundred twenty-two billion, twelve million, two hundred twenty-two thousand, two hundred twenty".