12001313211320 has 128 divisors (see below), whose sum is σ = 28213925192640. Its totient is φ = 4590890680320.

The previous prime is 12001313211253. The next prime is 12001313211323. The reversal of 12001313211320 is 2311231310021.

It is a happy number.

It is a super-2 number, since 2×12001313211320² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12001313211292 and 12001313211301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001313211323) 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 31 ways as a sum of consecutive naturals, for example, 16852880 + ... + 17550560.

Almost surely, 2^{12001313211320} is an apocalyptic number.

12001313211320 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 12001313211320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14106962596320).

12001313211320 is an abundant number, since it is smaller than the sum of its proper divisors (16212611981320).

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

12001313211320 is a wasteful number, since it uses less digits than its factorization.

12001313211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697945 (or 697941 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 12001313211320 its reverse (2311231310021), we get a palindrome (14312544521341).

The spelling of 12001313211320 in words is "twelve trillion, one billion, three hundred thirteen million, two hundred eleven thousand, three hundred twenty".