12321401320 has 32 divisors (see below), whose sum is σ = 27753078600. Its totient is φ = 4923240448.

The previous prime is 12321401299. The next prime is 12321401353. The reversal of 12321401320 is 2310412321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3289940164 + 9031461156 = 57358^2 + 95034^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128629 + ... + 202948.

Almost surely, 2^12321401320 is an apocalyptic number.

12321401320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12321401320 is an abundant number, since it is smaller than the sum of its proper divisors (15431677280).

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

12321401320 is a wasteful number, since it uses less digits than its factorization.

12321401320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332517 (or 332513 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12321401320 its reverse (2310412321), we get a palindrome (14631813641).

The spelling of 12321401320 in words is "twelve billion, three hundred twenty-one million, four hundred one thousand, three hundred twenty".