201220221 has 8 divisors (see below), whose sum is σ = 268721344. Its totient is φ = 133932960.

The previous prime is 201220199. The next prime is 201220223. The reversal of 201220221 is 122022102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201220221 - 2¹⁵ = 201187453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220197 and 201220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51256 + ... + 55041.

It is an arithmetic number, because the mean of its divisors is an integer number (33590168).

Almost surely, 2^201220221 is an apocalyptic number.

It is an amenable number.

201220221 is a deficient number, since it is larger than the sum of its proper divisors (67501123).

201220221 is a wasteful number, since it uses less digits than its factorization.

201220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106931.

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

The square root of 201220221 is about 14185.2113484431. The cubic root of 201220221 is about 585.9904530433.

Adding to 201220221 its reverse (122022102), we get a palindrome (323242323).

The spelling of 201220221 in words is "two hundred one million, two hundred twenty thousand, two hundred twenty-one".