221213201 has 8 divisors (see below), whose sum is σ = 241483008. Its totient is φ = 200970000.

The previous prime is 221213183. The next prime is 221213221. The reversal of 221213201 is 102312122.

It is a happy number.

221213201 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 de Polignac number, because none of the positive numbers 2^k-221213201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221213221) 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, 13376 + ... + 24926.

It is an arithmetic number, because the mean of its divisors is an integer number (30185376).

Almost surely, 2^221213201 is an apocalyptic number.

It is an amenable number.

221213201 is a deficient number, since it is larger than the sum of its proper divisors (20269807).

221213201 is a wasteful number, since it uses less digits than its factorization.

221213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13303.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221213201 is about 14873.2377443514. The cubic root of 221213201 is about 604.7887166055.

Adding to 221213201 its reverse (102312122), we get a palindrome (323525323).

The spelling of 221213201 in words is "two hundred twenty-one million, two hundred thirteen thousand, two hundred one".