21034222 has 16 divisors (see below), whose sum is σ = 35607600. Its totient is φ = 9231040.

The previous prime is 21034201. The next prime is 21034229. The reversal of 21034222 is 22243012.

It is a junction number, because it is equal to n+sod(n) for n = 21034196 and 21034205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15847 + ... + 17122.

It is an arithmetic number, because the mean of its divisors is an integer number (2225475).

Almost surely, 2^21034222 is an apocalyptic number.

21034222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21034222 is a deficient number, since it is larger than the sum of its proper divisors (14573378).

21034222 is a wasteful number, since it uses less digits than its factorization.

21034222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33011.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 21034222 is about 4586.3081012945. The cubic root of 21034222 is about 276.0422028163.

Adding to 21034222 its reverse (22243012), we get a palindrome (43277234).

The spelling of 21034222 in words is "twenty-one million, thirty-four thousand, two hundred twenty-two".