221204001 has 8 divisors (see below), whose sum is σ = 295172640. Its totient is φ = 147352352.

The previous prime is 221203993. The next prime is 221204063. The reversal of 221204001 is 100402122.

221204001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221204001 - 2³ = 221203993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221204801) 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, 24735 + ... + 32468.

It is an arithmetic number, because the mean of its divisors is an integer number (36896580).

Almost surely, 2^221204001 is an apocalyptic number.

It is an amenable number.

221204001 is a deficient number, since it is larger than the sum of its proper divisors (73968639).

221204001 is a wasteful number, since it uses less digits than its factorization.

221204001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58495.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 221204001 is about 14872.9284607975. The cubic root of 221204001 is about 604.7803323360.

Adding to 221204001 its reverse (100402122), we get a palindrome (321606123).

The spelling of 221204001 in words is "two hundred twenty-one million, two hundred four thousand, one".