21103322 has 4 divisors (see below), whose sum is σ = 31654986. Its totient is φ = 10551660.

The previous prime is 21103321. The next prime is 21103337. The reversal of 21103322 is 22330112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12453841 + 8649481 = 3529^2 + 2941^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21103297 and 21103306.

It is not an unprimeable number, because it can be changed into a prime (21103321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275829 + ... + 5275832.

Almost surely, 2^21103322 is an apocalyptic number.

21103322 is a deficient number, since it is larger than the sum of its proper divisors (10551664).

21103322 is a wasteful number, since it uses less digits than its factorization.

21103322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551663.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21103322 is about 4593.8352168967. The cubic root of 21103322 is about 276.3441499143.

Adding to 21103322 its reverse (22330112), we get a palindrome (43433434).

The spelling of 21103322 in words is "twenty-one million, one hundred three thousand, three hundred twenty-two".