221361201 has 16 divisors (see below), whose sum is σ = 329163520. Its totient is φ = 147024720.

The previous prime is 221361197. The next prime is 221361227. The reversal of 221361201 is 102163122.

It is not a de Polignac number, because 221361201 - 2² = 221361197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221361241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7810 + ... + 22443.

It is an arithmetic number, because the mean of its divisors is an integer number (20572720).

Almost surely, 2^221361201 is an apocalyptic number.

It is an amenable number.

221361201 is a deficient number, since it is larger than the sum of its proper divisors (107802319).

221361201 is a wasteful number, since it uses less digits than its factorization.

221361201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30533 (or 30527 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 221361201 is about 14878.2122918044. The cubic root of 221361201 is about 604.9235620480.

The spelling of 221361201 in words is "two hundred twenty-one million, three hundred sixty-one thousand, two hundred one".