221312203 has 8 divisors (see below), whose sum is σ = 254128640. Its totient is φ = 188795880.

The previous prime is 221312191. The next prime is 221312243. The reversal of 221312203 is 302213122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221312203 - 2¹⁷ = 221181131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221312243) 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, 73443 + ... + 76396.

It is an arithmetic number, because the mean of its divisors is an integer number (31766080).

Almost surely, 2^221312203 is an apocalyptic number.

221312203 is a deficient number, since it is larger than the sum of its proper divisors (32816437).

221312203 is a wasteful number, since it uses less digits than its factorization.

221312203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150057.

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

The square root of 221312203 is about 14876.5655646725. The cubic root of 221312203 is about 604.8789257526.

Adding to 221312203 its reverse (302213122), we get a palindrome (523525325).

The spelling of 221312203 in words is "two hundred twenty-one million, three hundred twelve thousand, two hundred three".