12320311332 has 96 divisors (see below), whose sum is σ = 35227422720. Its totient is φ = 3271057920.

The previous prime is 12320311331. The next prime is 12320311351. The reversal of 12320311332 is 23311302321.

It is a super-2 number, since 2×12320311332² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12320311299 and 12320311308.

It is not an unprimeable number, because it can be changed into a prime (12320311331) 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, 58207 + ... + 167417.

It is an arithmetic number, because the mean of its divisors is an integer number (366952320).

Almost surely, 2^12320311332 is an apocalyptic number.

12320311332 is a gapful number since it is divisible by the number (12) 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 12320311332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17613711360).

12320311332 is an abundant number, since it is smaller than the sum of its proper divisors (22907111388).

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

12320311332 is a wasteful number, since it uses less digits than its factorization.

12320311332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109321 (or 109319 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12320311332 its reverse (23311302321), we get a palindrome (35631613653).

The spelling of 12320311332 in words is "twelve billion, three hundred twenty million, three hundred eleven thousand, three hundred thirty-two".