221032001 has 8 divisors (see below), whose sum is σ = 230829504. Its totient is φ = 211250160.

The previous prime is 221031983. The next prime is 221032003. The reversal of 221032001 is 100230122.

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 221032001 - 2¹⁰ = 221030977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221032003) 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 7 ways as a sum of consecutive naturals, for example, 32075 + ... + 38351.

It is an arithmetic number, because the mean of its divisors is an integer number (28853688).

Almost surely, 2^221032001 is an apocalyptic number.

It is an amenable number.

221032001 is a deficient number, since it is larger than the sum of its proper divisors (9797503).

221032001 is a wasteful number, since it uses less digits than its factorization.

221032001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7831.

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

The square root of 221032001 is about 14867.1450184627. The cubic root of 221032001 is about 604.6235401296.

Adding to 221032001 its reverse (100230122), we get a palindrome (321262123).

The spelling of 221032001 in words is "two hundred twenty-one million, thirty-two thousand, one".