12001111021320 has 64 divisors (see below), whose sum is σ = 36146772728640. Its totient is φ = 3187546080000.

The previous prime is 12001111021303. The next prime is 12001111021327. The reversal of 12001111021320 is 2312011110021.

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 12001111021320.

It is not an unprimeable number, because it can be changed into a prime (12001111021327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199191511 + ... + 199251750.

It is an arithmetic number, because the mean of its divisors is an integer number (564793323885).

Almost surely, 2^{12001111021320} is an apocalyptic number.

12001111021320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001111021320 is an abundant number, since it is smaller than the sum of its proper divisors (24145661707320).

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

12001111021320 is a wasteful number, since it uses less digits than its factorization.

12001111021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398443526 (or 398443522 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12001111021320 its reverse (2312011110021), we get a palindrome (14313122131341).

The spelling of 12001111021320 in words is "twelve trillion, one billion, one hundred eleven million, twenty-one thousand, three hundred twenty".