12011220311320 has 64 divisors (see below), whose sum is σ = 27898963257600. Its totient is φ = 4649182064640.

The previous prime is 12011220311303. The next prime is 12011220311329. The reversal of 12011220311320 is 2311302211021.

It is a super-2 number, since 2×12011220311320² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011220311329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17945236 + ... + 18602524.

It is an arithmetic number, because the mean of its divisors is an integer number (435921300900).

Almost surely, 2^{12011220311320} is an apocalyptic number.

12011220311320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011220311320 is an abundant number, since it is smaller than the sum of its proper divisors (15887742946280).

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

12011220311320 is a wasteful number, since it uses less digits than its factorization.

12011220311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672068 (or 672064 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12011220311320 its reverse (2311302211021), we get a palindrome (14322522522341).

The spelling of 12011220311320 in words is "twelve trillion, eleven billion, two hundred twenty million, three hundred eleven thousand, three hundred twenty".