200100020021 has 16 divisors (see below), whose sum is σ = 234581313600. Its totient is φ = 168653210880.

The previous prime is 200100019963. The next prime is 200100020051. The reversal of 200100020021 is 120020001002.

It is a de Polignac number, because none of the positive numbers 2^k-200100020021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200100019990 and 200100020008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200100020051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7972946 + ... + 7998003.

It is an arithmetic number, because the mean of its divisors is an integer number (14661332100).

Almost surely, 2^200100020021 is an apocalyptic number.

It is an amenable number.

200100020021 is a deficient number, since it is larger than the sum of its proper divisors (34481293579).

200100020021 is a wasteful number, since it uses less digits than its factorization.

200100020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15971044.

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

Adding to 200100020021 its reverse (120020001002), we get a palindrome (320120021023).

The spelling of 200100020021 in words is "two hundred billion, one hundred million, twenty thousand, twenty-one".