12221122222120 has 128 divisors (see below), whose sum is σ = 31779203558400. Its totient is φ = 4143081600000.

The previous prime is 12221122222103. The next prime is 12221122222247. The reversal of 12221122222120 is 2122222112221.

It is a junction number, because it is equal to n+sod(n) for n = 12221122222091 and 12221122222100.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20950566 + ... + 21525994.

It is an arithmetic number, because the mean of its divisors is an integer number (248275027800).

Almost surely, 2^{12221122222120} is an apocalyptic number.

12221122222120 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 12221122222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15889601779200).

12221122222120 is an abundant number, since it is smaller than the sum of its proper divisors (19558081336280).

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

12221122222120 is a wasteful number, since it uses less digits than its factorization.

12221122222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576299 (or 576295 counting only the distinct ones).

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

Adding to 12221122222120 its reverse (2122222112221), we get a palindrome (14343344334341).

The spelling of 12221122222120 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty".