12001311320 has 32 divisors (see below), whose sum is σ = 27011361600. Its totient is φ = 4799029248.

The previous prime is 12001311319. The next prime is 12001311337. The reversal of 12001311320 is 2311310021.

It is a junction number, because it is equal to n+sod(n) for n = 12001311295 and 12001311304.

It is a congruent number.

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, 88097 + ... + 178223.

It is an arithmetic number, because the mean of its divisors is an integer number (844105050).

Almost surely, 2^12001311320 is an apocalyptic number.

12001311320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001311320 is an abundant number, since it is smaller than the sum of its proper divisors (15010050280).

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

12001311320 is a wasteful number, since it uses less digits than its factorization.

12001311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93467 (or 93463 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12001311320 its reverse (2311310021), we get a palindrome (14312621341).

The spelling of 12001311320 in words is "twelve billion, one million, three hundred eleven thousand, three hundred twenty".