200001000221 has 4 divisors (see below), whose sum is σ = 218182909344. Its totient is φ = 181819091100.

The previous prime is 200001000187. The next prime is 200001000233. The reversal of 200001000221 is 122000100002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200001000221 - 2¹⁰ = 200000999197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200001000199 and 200001000208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200001000271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9090954545 + ... + 9090954566.

It is an arithmetic number, because the mean of its divisors is an integer number (54545727336).

Almost surely, 2^200001000221 is an apocalyptic number.

It is an amenable number.

200001000221 is a deficient number, since it is larger than the sum of its proper divisors (18181909123).

200001000221 is a wasteful number, since it uses less digits than its factorization.

200001000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18181909122.

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

Adding to 200001000221 its reverse (122000100002), we get a palindrome (322001100223).

The spelling of 200001000221 in words is "two hundred billion, one million, two hundred twenty-one", and thus it is an aban number.