213321103 has 4 divisors (see below), whose sum is σ = 213350760. Its totient is φ = 213291448.

The previous prime is 213321091. The next prime is 213321107. The reversal of 213321103 is 301123312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213321103 - 2¹⁷ = 213190031 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 (213321107) 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, 3576 + ... + 20962.

It is an arithmetic number, because the mean of its divisors is an integer number (53337690).

Almost surely, 2^213321103 is an apocalyptic number.

213321103 is a deficient number, since it is larger than the sum of its proper divisors (29657).

213321103 is a wasteful number, since it uses less digits than its factorization.

213321103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29656.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 213321103 is about 14605.5161839628. The cubic root of 213321103 is about 597.5092140990.

Adding to 213321103 its reverse (301123312), we get a palindrome (514444415).

The spelling of 213321103 in words is "two hundred thirteen million, three hundred twenty-one thousand, one hundred three".