12311333320 has 128 divisors (see below), whose sum is σ = 32591341440. Its totient is φ = 4126371840.

The previous prime is 12311333299. The next prime is 12311333323. The reversal of 12311333320 is 2333311321.

It is a super-2 number, since 2×12311333320² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 12311333291 and 12311333300.

It is not an unprimeable number, because it can be changed into a prime (12311333323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5587339 + ... + 5589541.

It is an arithmetic number, because the mean of its divisors is an integer number (254619855).

Almost surely, 2^12311333320 is an apocalyptic number.

12311333320 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 12311333320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16295670720).

12311333320 is an abundant number, since it is smaller than the sum of its proper divisors (20280008120).

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

12311333320 is a wasteful number, since it uses less digits than its factorization.

12311333320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215 (or 3211 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 12311333320 its reverse (2333311321), we get a palindrome (14644644641).

The spelling of 12311333320 in words is "twelve billion, three hundred eleven million, three hundred thirty-three thousand, three hundred twenty".