201205221 has 48 divisors (see below), whose sum is σ = 327444480. Its totient is φ = 109438560.

The previous prime is 201205139. The next prime is 201205229. The reversal of 201205221 is 122502102.

It is not a de Polignac number, because 201205221 - 2¹⁴ = 201188837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201205221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201205229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304990 + ... + 305648.

It is an arithmetic number, because the mean of its divisors is an integer number (6821760).

Almost surely, 2^201205221 is an apocalyptic number.

201205221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201205221 is a deficient number, since it is larger than the sum of its proper divisors (126239259).

201205221 is a wasteful number, since it uses less digits than its factorization.

201205221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 201205221 is about 14184.6826189379. The cubic root of 201205221 is about 585.9758917579.

Adding to 201205221 its reverse (122502102), we get a palindrome (323707323).

The spelling of 201205221 in words is "two hundred one million, two hundred five thousand, two hundred twenty-one".