221312103 has 16 divisors (see below), whose sum is σ = 312744960. Its totient is φ = 138727296.

The previous prime is 221312081. The next prime is 221312149. The reversal of 221312103 is 301213122.

It is not a de Polignac number, because 221312103 - 2⁹ = 221311591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221312303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88476 + ... + 90942.

It is an arithmetic number, because the mean of its divisors is an integer number (19546560).

Almost surely, 2^221312103 is an apocalyptic number.

221312103 is a deficient number, since it is larger than the sum of its proper divisors (91432857).

221312103 is a wasteful number, since it uses less digits than its factorization.

221312103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 221312103 is about 14876.5622036813. The cubic root of 221312103 is about 604.8788346476.

Adding to 221312103 its reverse (301213122), we get a palindrome (522525225).

The spelling of 221312103 in words is "two hundred twenty-one million, three hundred twelve thousand, one hundred three".