221323210103 has 4 divisors (see below), whose sum is σ = 234342222480. Its totient is φ = 208304197728.

The previous prime is 221323210037. The next prime is 221323210117. The reversal of 221323210103 is 301012323122.

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 221323210103 - 2¹⁸ = 221322947959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323210123) 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, 6509506163 + ... + 6509506196.

It is an arithmetic number, because the mean of its divisors is an integer number (58585555620).

Almost surely, 2^221323210103 is an apocalyptic number.

221323210103 is a deficient number, since it is larger than the sum of its proper divisors (13019012377).

221323210103 is a wasteful number, since it uses less digits than its factorization.

221323210103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13019012376.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221323210103 its reverse (301012323122), we get a palindrome (522335533225).

The spelling of 221323210103 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred ten thousand, one hundred three".