12212122120 has 128 divisors (see below), whose sum is σ = 31107732480. Its totient is φ = 4275936000.

The previous prime is 12212122037. The next prime is 12212122127. The reversal of 12212122120 is 2122121221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12212122094 and 12212122103.

It is not an unprimeable number, because it can be changed into a prime (12212122127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1338775 + ... + 1347865.

It is an arithmetic number, because the mean of its divisors is an integer number (243029160).

Almost surely, 2^12212122120 is an apocalyptic number.

12212122120 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 12212122120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15553866240).

12212122120 is an abundant number, since it is smaller than the sum of its proper divisors (18895610360).

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

12212122120 is a wasteful number, since it uses less digits than its factorization.

12212122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9227 (or 9223 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12212122120 its reverse (2122121221), we get a palindrome (14334243341).

The spelling of 12212122120 in words is "twelve billion, two hundred twelve million, one hundred twenty-two thousand, one hundred twenty".