12012221120 has 56 divisors (see below), whose sum is σ = 28715598144. Its totient is φ = 4786159616.

The previous prime is 12012221119. The next prime is 12012221129. The reversal of 12012221120 is 2112221021.

It is a junction number, because it is equal to n+sod(n) for n = 12012221095 and 12012221104.

It is not an unprimeable number, because it can be changed into a prime (12012221129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9209 + ... + 155271.

Almost surely, 2^12012221120 is an apocalyptic number.

12012221120 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 12012221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14357799072).

12012221120 is an abundant number, since it is smaller than the sum of its proper divisors (16703377024).

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

12012221120 is a wasteful number, since it uses less digits than its factorization.

12012221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146337 (or 146327 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12012221120 its reverse (2112221021), we get a palindrome (14124442141).

Subtracting from 12012221120 its reverse (2112221021), we obtain a palindrome (9900000099).

The spelling of 12012221120 in words is "twelve billion, twelve million, two hundred twenty-one thousand, one hundred twenty".