21103222 has 48 divisors (see below), whose sum is σ = 39890880. Its totient is φ = 8316672.

The previous prime is 21103217. The next prime is 21103241. The reversal of 21103222 is 22230112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88179 + ... + 88417.

It is an arithmetic number, because the mean of its divisors is an integer number (831060).

Almost surely, 2^21103222 is an apocalyptic number.

21103222 is a deficient number, since it is larger than the sum of its proper divisors (18787658).

21103222 is a wasteful number, since it uses less digits than its factorization.

21103222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21103222 is about 4593.8243327319. The cubic root of 21103222 is about 276.3437134197.

Adding to 21103222 its reverse (22230112), we get a palindrome (43333334).

The spelling of 21103222 in words is "twenty-one million, one hundred three thousand, two hundred twenty-two".