12120222132 has 120 divisors (see below), whose sum is σ = 33416792640. Its totient is φ = 3820037760.

The previous prime is 12120222109. The next prime is 12120222137. The reversal of 12120222132 is 23122202121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120222137) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 3796657 + ... + 3799847.

It is an arithmetic number, because the mean of its divisors is an integer number (278473272).

Almost surely, 2^12120222132 is an apocalyptic number.

12120222132 is a gapful number since it is divisible by the number (12) 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 12120222132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16708396320).

12120222132 is an abundant number, since it is smaller than the sum of its proper divisors (21296570508).

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

12120222132 is a wasteful number, since it uses less digits than its factorization.

12120222132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3843 (or 3832 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12120222132 its reverse (23122202121), we get a palindrome (35242424253).

The spelling of 12120222132 in words is "twelve billion, one hundred twenty million, two hundred twenty-two thousand, one hundred thirty-two".