12213421320 has 64 divisors (see below), whose sum is σ = 37018033920. Its totient is φ = 3223332864.

The previous prime is 12213421313. The next prime is 12213421321. The reversal of 12213421320 is 2312431221.

It is not an unprimeable number, because it can be changed into a prime (12213421321) 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, 512992 + ... + 536271.

It is an arithmetic number, because the mean of its divisors is an integer number (578406780).

Almost surely, 2^12213421320 is an apocalyptic number.

12213421320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12213421320 is an abundant number, since it is smaller than the sum of its proper divisors (24804612600).

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

12213421320 is a wasteful number, since it uses less digits than its factorization.

12213421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049374 (or 1049370 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12213421320 its reverse (2312431221), we get a palindrome (14525852541).

Subtracting from 12213421320 its reverse (2312431221), we obtain a palindrome (9900990099).

The spelling of 12213421320 in words is "twelve billion, two hundred thirteen million, four hundred twenty-one thousand, three hundred twenty".