12212222120 has 64 divisors (see below), whose sum is σ = 31502148480. Its totient is φ = 4173808896.

The previous prime is 12212222101. The next prime is 12212222171. The reversal of 12212222120 is 2122221221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19967 + ... + 157553.

It is an arithmetic number, because the mean of its divisors is an integer number (492221070).

Almost surely, 2^12212222120 is an apocalyptic number.

12212222120 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 12212222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15751074240).

12212222120 is an abundant number, since it is smaller than the sum of its proper divisors (19289926360).

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

12212222120 is a wasteful number, since it uses less digits than its factorization.

12212222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137922 (or 137918 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12212222120 its reverse (2122221221), we get a palindrome (14334443341).

The spelling of 12212222120 in words is "twelve billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty".