12001231011220 has 96 divisors (see below), whose sum is σ = 27583733882880. Its totient is φ = 4349812199040.

The previous prime is 12001231011199. The next prime is 12001231011283. The reversal of 12001231011220 is 2211013210021.

It is a junction number, because it is equal to n+sod(n) for n = 12001231011194 and 12001231011203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133946877 + ... + 134036443.

It is an arithmetic number, because the mean of its divisors is an integer number (287330561280).

Almost surely, 2^{12001231011220} is an apocalyptic number.

12001231011220 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 12001231011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13791866941440).

12001231011220 is an abundant number, since it is smaller than the sum of its proper divisors (15582502871660).

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

12001231011220 is a wasteful number, since it uses less digits than its factorization.

12001231011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91573 (or 91571 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12001231011220 its reverse (2211013210021), we get a palindrome (14212244221241).

The spelling of 12001231011220 in words is "twelve trillion, one billion, two hundred thirty-one million, eleven thousand, two hundred twenty".