21112001200100 has 72 divisors (see below), whose sum is σ = 48238424626560. Its totient is φ = 7997986638720.

The previous prime is 21112001200091. The next prime is 21112001200151. The reversal of 21112001200100 is 100210021112.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4842602 + ... + 8103998.

Almost surely, 2^{21112001200100} is an apocalyptic number.

21112001200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112001200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24119212313280).

21112001200100 is an abundant number, since it is smaller than the sum of its proper divisors (27126423426460).

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

21112001200100 is a wasteful number, since it uses less digits than its factorization.

21112001200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264837 (or 3264830 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21112001200100 its reverse (100210021112), we get a palindrome (21212211221212).

The spelling of 21112001200100 in words is "twenty-one trillion, one hundred twelve billion, one million, two hundred thousand, one hundred".