221214801 has 8 divisors (see below), whose sum is σ = 295039584. Its totient is φ = 147433280.

The previous prime is 221214797. The next prime is 221214809. The reversal of 221214801 is 108412122.

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 221214801 - 2² = 221214797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221214809) 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, 4030 + ... + 21416.

It is an arithmetic number, because the mean of its divisors is an integer number (36879948).

Almost surely, 2^221214801 is an apocalyptic number.

It is an amenable number.

221214801 is a deficient number, since it is larger than the sum of its proper divisors (73824783).

221214801 is a wasteful number, since it uses less digits than its factorization.

221214801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21631.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 221214801 is about 14873.2915321391. The cubic root of 221214801 is about 604.7901747156.

Adding to 221214801 its reverse (108412122), we get a palindrome (329626923).

The spelling of 221214801 in words is "two hundred twenty-one million, two hundred fourteen thousand, eight hundred one".