12122122112212 has 96 divisors (see below), whose sum is σ = 25593342566400. Its totient is φ = 5018297760000.

The previous prime is 12122122112179. The next prime is 12122122112263. The reversal of 12122122112212 is 21221122122121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4614637 + ... + 6748267.

It is an arithmetic number, because the mean of its divisors is an integer number (266597318400).

Almost surely, 2^{12122122112212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12122122112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12796671283200).

12122122112212 is an abundant number, since it is smaller than the sum of its proper divisors (13471220454188).

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

12122122112212 is a wasteful number, since it uses less digits than its factorization.

12122122112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133798 (or 2133782 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

Adding to 12122122112212 its reverse (21221122122121), we get a palindrome (33343244234333).

Subtracting 12122122112212 from its reverse (21221122122121), we obtain a palindrome (9099000009909).

The spelling of 12122122112212 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-two million, one hundred twelve thousand, two hundred twelve".