12122122212220 has 12 divisors (see below), whose sum is σ = 25456456645704. Its totient is φ = 4848848884880.

The previous prime is 12122122212197. The next prime is 12122122212259. The reversal of 12122122212220 is 2221222122121.

It is a junction number, because it is equal to n+sod(n) for n = 12122122212191 and 12122122212200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303053055286 + ... + 303053055325.

It is an arithmetic number, because the mean of its divisors is an integer number (2121371387142).

Almost surely, 2^{12122122212220} is an apocalyptic number.

12122122212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122122212220 is an abundant number, since it is smaller than the sum of its proper divisors (13334334433484).

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

12122122212220 is a wasteful number, since it uses less digits than its factorization.

12122122212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606106110620 (or 606106110618 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 12122122212220 its reverse (2221222122121), we get a palindrome (14343344334341).

Subtracting from 12122122212220 its reverse (2221222122121), we obtain a palindrome (9900900090099).

The spelling of 12122122212220 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-two million, two hundred twelve thousand, two hundred twenty".