12001111221120 has 128 divisors (see below), whose sum is σ = 43718333783040. Its totient is φ = 2743111133184.

The previous prime is 12001111221101. The next prime is 12001111221149. The reversal of 12001111221120 is 2112211110021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12001111221120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446456472 + ... + 446483351.

It is an arithmetic number, because the mean of its divisors is an integer number (341549482680).

Almost surely, 2^{12001111221120} is an apocalyptic number.

12001111221120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001111221120 is an abundant number, since it is smaller than the sum of its proper divisors (31717222561920).

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

12001111221120 is an equidigital number, since it uses as much as digits as its factorization.

12001111221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892939852 (or 892939840 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12001111221120 its reverse (2112211110021), we get a palindrome (14113322331141).

The spelling of 12001111221120 in words is "twelve trillion, one billion, one hundred eleven million, two hundred twenty-one thousand, one hundred twenty".