21100443413300 has 36 divisors (see below), whose sum is σ = 46904741781996. Its totient is φ = 8234319379200.

The previous prime is 21100443413297. The next prime is 21100443413311. The reversal of 21100443413300 is 331434400112.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 9450877795984 + 11649565617316 = 3074228^2 + 3413146^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21100443413300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2573220707 + ... + 2573228906.

Almost surely, 2^{21100443413300} is an apocalyptic number.

21100443413300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100443413300 is an abundant number, since it is smaller than the sum of its proper divisors (25804298368696).

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

21100443413300 is a wasteful number, since it uses less digits than its factorization.

21100443413300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146449668 (or 5146449661 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21100443413300 its reverse (331434400112), we get a palindrome (21431877813412).

The spelling of 21100443413300 in words is "twenty-one trillion, one hundred billion, four hundred forty-three million, four hundred thirteen thousand, three hundred".