12001020221112 has 128 divisors (see below), whose sum is σ = 33414375966720. Its totient is φ = 3566897856000.

The previous prime is 12001020221093. The next prime is 12001020221119. The reversal of 12001020221112 is 21112202010021.

It is a junction number, because it is equal to n+sod(n) for n = 12001020221091 and 12001020221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001020221119) 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, 4085787 + ... + 6379317.

It is an arithmetic number, because the mean of its divisors is an integer number (261049812240).

Almost surely, 2^{12001020221112} is an apocalyptic number.

12001020221112 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 12001020221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16707187983360).

12001020221112 is an abundant number, since it is smaller than the sum of its proper divisors (21413355745608).

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

12001020221112 is a wasteful number, since it uses less digits than its factorization.

12001020221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294125 (or 2294121 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12001020221112 its reverse (21112202010021), we get a palindrome (33113222231133).

The spelling of 12001020221112 in words is "twelve trillion, one billion, twenty million, two hundred twenty-one thousand, one hundred twelve".