221210103 has 32 divisors (see below), whose sum is σ = 336441600. Its totient is φ = 128411136.

The previous prime is 221210053. The next prime is 221210111. The reversal of 221210103 is 301012122.

It is not a de Polignac number, because 221210103 - 2⁸ = 221209847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39013 + ... + 44321.

It is an arithmetic number, because the mean of its divisors is an integer number (10513800).

Almost surely, 2^221210103 is an apocalyptic number.

221210103 is a deficient number, since it is larger than the sum of its proper divisors (115231497).

221210103 is a wasteful number, since it uses less digits than its factorization.

221210103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5391.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221210103 is about 14873.1335971946. The cubic root of 221210103 is about 604.7858933198.

Adding to 221210103 its reverse (301012122), we get a palindrome (522222225).

The spelling of 221210103 in words is "two hundred twenty-one million, two hundred ten thousand, one hundred three".