201022221 has 16 divisors (see below), whose sum is σ = 281994048. Its totient is φ = 127209600.

The previous prime is 201022207. The next prime is 201022271. The reversal of 201022221 is 122220102.

It is not a de Polignac number, because 201022221 - 2⁵ = 201022189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201022197 and 201022206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201022271) 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, 17535 + ... + 26636.

It is an arithmetic number, because the mean of its divisors is an integer number (17624628).

Almost surely, 2^201022221 is an apocalyptic number.

It is an amenable number.

201022221 is a deficient number, since it is larger than the sum of its proper divisors (80971827).

201022221 is a wasteful number, since it uses less digits than its factorization.

201022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44252.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 201022221 is about 14178.2305313463. The cubic root of 201022221 is about 585.7981857745.

Adding to 201022221 its reverse (122220102), we get a palindrome (323242323).

The spelling of 201022221 in words is "two hundred one million, twenty-two thousand, two hundred twenty-one".