201000222221 has 4 divisors (see below), whose sum is σ = 201117836700. Its totient is φ = 200882607744.

The previous prime is 201000222187. The next prime is 201000222223. The reversal of 201000222221 is 122222000102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40050015625 + 160950206596 = 200125^2 + 401186^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000222221 - 2²² = 200996027917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201000222196 and 201000222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000222223) 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, 58804676 + ... + 58808093.

It is an arithmetic number, because the mean of its divisors is an integer number (50279459175).

Almost surely, 2^201000222221 is an apocalyptic number.

It is an amenable number.

201000222221 is a deficient number, since it is larger than the sum of its proper divisors (117614479).

201000222221 is a wasteful number, since it uses less digits than its factorization.

201000222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117614478.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 201000222221 its reverse (122222000102), we get a palindrome (323222222323).

The spelling of 201000222221 in words is "two hundred one billion, two hundred twenty-two thousand, two hundred twenty-one".