12321321100 has 54 divisors (see below), whose sum is σ = 29388925412. Its totient is φ = 4480476000.

The previous prime is 12321321083. The next prime is 12321321127. The reversal of 12321321100 is 112312321.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 497046 + ... + 521245.

Almost surely, 2^12321321100 is an apocalyptic number.

12321321100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12321321100 is an abundant number, since it is smaller than the sum of its proper divisors (17067604312).

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

12321321100 is a wasteful number, since it uses less digits than its factorization.

12321321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018327 (or 1018309 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12321321100 its reverse (112312321), we get a palindrome (12433633421).

The spelling of 12321321100 in words is "twelve billion, three hundred twenty-one million, three hundred twenty-one thousand, one hundred".