12311421320 has 32 divisors (see below), whose sum is σ = 30218944320. Its totient is φ = 4476880320.

The previous prime is 12311421299. The next prime is 12311421323. The reversal of 12311421320 is 2312411321.

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 = 12311421292 and 12311421301.

It is not an unprimeable number, because it can be changed into a prime (12311421323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13989812 + ... + 13990691.

It is an arithmetic number, because the mean of its divisors is an integer number (944342010).

Almost surely, 2^12311421320 is an apocalyptic number.

12311421320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311421320 is an abundant number, since it is smaller than the sum of its proper divisors (17907523000).

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

12311421320 is a wasteful number, since it uses less digits than its factorization.

12311421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27980525 (or 27980521 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12311421320 its reverse (2312411321), we get a palindrome (14623832641).

Subtracting from 12311421320 its reverse (2312411321), we obtain a palindrome (9999009999).

The spelling of 12311421320 in words is "twelve billion, three hundred eleven million, four hundred twenty-one thousand, three hundred twenty".