12122201220 has 96 divisors (see below), whose sum is σ = 36910194048. Its totient is φ = 2960197632.

The previous prime is 12122201213. The next prime is 12122201239. The reversal of 12122201220 is 2210222121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12122201220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122862 + ... + 198341.

It is an arithmetic number, because the mean of its divisors is an integer number (384481188).

Almost surely, 2^12122201220 is an apocalyptic number.

12122201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122201220 is an abundant number, since it is smaller than the sum of its proper divisors (24787992828).

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

12122201220 is a wasteful number, since it uses less digits than its factorization.

12122201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321269 (or 321267 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12122201220 its reverse (2210222121), we get a palindrome (14332423341).

The spelling of 12122201220 in words is "twelve billion, one hundred twenty-two million, two hundred one thousand, two hundred twenty".