12012222211122 has 128 divisors (see below), whose sum is σ = 28974416117760. Its totient is φ = 3243245322240.

The previous prime is 12012222211081. The next prime is 12012222211127. The reversal of 12012222211122 is 22111222221021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12012222211127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 561124543 + ... + 561145949.

It is an arithmetic number, because the mean of its divisors is an integer number (226362625920).

Almost surely, 2^{12012222211122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12012222211122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14487208058880).

12012222211122 is an abundant number, since it is smaller than the sum of its proper divisors (16962193906638).

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

12012222211122 is a wasteful number, since it uses less digits than its factorization.

12012222211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23176.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12012222211122 its reverse (22111222221021), we get a palindrome (34123444432143).

The spelling of 12012222211122 in words is "twelve trillion, twelve billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty-two".