221201003 has 8 divisors (see below), whose sum is σ = 225218400. Its totient is φ = 217219968.

The previous prime is 221200999. The next prime is 221201017. The reversal of 221201003 is 300102122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221201003 - 2² = 221200999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221201033) 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, 3338 + ... + 21296.

It is an arithmetic number, because the mean of its divisors is an integer number (28152300).

Almost surely, 2^221201003 is an apocalyptic number.

221201003 is a deficient number, since it is larger than the sum of its proper divisors (4017397).

221201003 is a wasteful number, since it uses less digits than its factorization.

221201003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18181.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 221201003 is about 14872.8276733108. The cubic root of 221201003 is about 604.7776001075. Note that the first 3 decimals are identical.

Adding to 221201003 its reverse (300102122), we get a palindrome (521303125).

The spelling of 221201003 in words is "two hundred twenty-one million, two hundred one thousand, three".