221333001 has 8 divisors (see below), whose sum is σ = 303086784. Its totient is φ = 143567280.

The previous prime is 221332999. The next prime is 221333023. The reversal of 221333001 is 100333122.

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

It is not a de Polignac number, because 221333001 - 2¹ = 221332999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221333041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996885 + ... + 997106.

It is an arithmetic number, because the mean of its divisors is an integer number (37885848).

Almost surely, 2^221333001 is an apocalyptic number.

It is an amenable number.

221333001 is a deficient number, since it is larger than the sum of its proper divisors (81753783).

221333001 is a wasteful number, since it uses less digits than its factorization.

221333001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994031.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 221333001 is about 14877.2645671172. The cubic root of 221333001 is about 604.8978731606.

Adding to 221333001 its reverse (100333122), we get a palindrome (321666123).

The spelling of 221333001 in words is "two hundred twenty-one million, three hundred thirty-three thousand, one".