12311223320 has 64 divisors (see below), whose sum is σ = 30511952640. Its totient is φ = 4433328000.

The previous prime is 12311223307. The next prime is 12311223329. The reversal of 12311223320 is 2332211321.

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 = 12311223292 and 12311223301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311223329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90506 + ... + 181145.

It is an arithmetic number, because the mean of its divisors is an integer number (476749260).

Almost surely, 2^12311223320 is an apocalyptic number.

12311223320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311223320 is an abundant number, since it is smaller than the sum of its proper divisors (18200729320).

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

12311223320 is a wasteful number, since it uses less digits than its factorization.

12311223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271776 (or 271772 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12311223320 its reverse (2332211321), we get a palindrome (14643434641).

The spelling of 12311223320 in words is "twelve billion, three hundred eleven million, two hundred twenty-three thousand, three hundred twenty".