12321322100 has 36 divisors (see below), whose sum is σ = 26854075500. Its totient is φ = 4906997760.

The previous prime is 12321322087. The next prime is 12321322109. The reversal of 12321322100 is 122312321.

It can be written as a sum of positive squares in 6 ways, for example, as 744853264 + 11576468836 = 27292^2 + 107594^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321322109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246125 + ... + 291924.

Almost surely, 2^12321322100 is an apocalyptic number.

12321322100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12321322100 is an abundant number, since it is smaller than the sum of its proper divisors (14532753400).

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

12321322100 is a wasteful number, since it uses less digits than its factorization.

12321322100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538292 (or 538285 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12321322100 its reverse (122312321), we get a palindrome (12443634421).

The spelling of 12321322100 in words is "twelve billion, three hundred twenty-one million, three hundred twenty-two thousand, one hundred".