12001313121320 has 32 divisors (see below), whose sum is σ = 27080326917000. Its totient is φ = 4786770156288.

The previous prime is 12001313121319. The next prime is 12001313121359. The reversal of 12001313121320 is 2312131310021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6983112783364 + 5018200337956 = 2642558^2 + 2240134^2 .

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 = 12001313121292 and 12001313121301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429832499 + ... + 429860418.

Almost surely, 2^{12001313121320} is an apocalyptic number.

12001313121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001313121320 is an abundant number, since it is smaller than the sum of its proper divisors (15079013795680).

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

12001313121320 is a wasteful number, since it uses less digits than its factorization.

12001313121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859693277 (or 859693273 counting only the distinct ones).

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

Adding to 12001313121320 its reverse (2312131310021), we get a palindrome (14313444431341).

The spelling of 12001313121320 in words is "twelve trillion, one billion, three hundred thirteen million, one hundred twenty-one thousand, three hundred twenty".