221231203 has 4 divisors (see below), whose sum is σ = 226627128. Its totient is φ = 215835280.

The previous prime is 221231191. The next prime is 221231207. The reversal of 221231203 is 302132122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221231203 - 2²¹ = 219134051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221231207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2697901 + ... + 2697982.

It is an arithmetic number, because the mean of its divisors is an integer number (56656782).

Almost surely, 2^221231203 is an apocalyptic number.

221231203 is a deficient number, since it is larger than the sum of its proper divisors (5395925).

221231203 is an equidigital number, since it uses as much as digits as its factorization.

221231203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395924.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221231203 is about 14873.8429129798. The cubic root of 221231203 is about 604.8051217614.

Adding to 221231203 its reverse (302132122), we get a palindrome (523363325).

The spelling of 221231203 in words is "two hundred twenty-one million, two hundred thirty-one thousand, two hundred three".