12643111100 has 36 divisors (see below), whose sum is σ = 28879531800. Its totient is φ = 4791072960.

The previous prime is 12643111093. The next prime is 12643111111. The reversal of 12643111100 is 111134621.

It is a happy number.

12643111100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3325235 + ... + 3329034.

Almost surely, 2^12643111100 is an apocalyptic number.

12643111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12643111100 is an abundant number, since it is smaller than the sum of its proper divisors (16236420700).

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

12643111100 is a wasteful number, since it uses less digits than its factorization.

12643111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6654302 (or 6654295 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12643111100 its reverse (111134621), we get a palindrome (12754245721).

The spelling of 12643111100 in words is "twelve billion, six hundred forty-three million, one hundred eleven thousand, one hundred".