201100200021 has 12 divisors (see below), whose sum is σ = 331974933472. Its totient is φ = 114914399976.

The previous prime is 201100200019. The next prime is 201100200071. The reversal of 201100200021 is 120002001102.

It is not a de Polignac number, because 201100200021 - 2¹ = 201100200019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 201100199976 and 201100200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201100200071) 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, 1596033271 + ... + 1596033396.

Almost surely, 2^201100200021 is an apocalyptic number.

201100200021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201100200021 is a deficient number, since it is larger than the sum of its proper divisors (130874733451).

201100200021 is a wasteful number, since it uses less digits than its factorization.

201100200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192066680 (or 3192066677 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 201100200021 its reverse (120002001102), we get a palindrome (321102201123).

The spelling of 201100200021 in words is "two hundred one billion, one hundred million, two hundred thousand, twenty-one".