21221102 has 16 divisors (see below), whose sum is σ = 37226112. Its totient is φ = 8883000.

The previous prime is 21221099. The next prime is 21221113. The reversal of 21221102 is 20112212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17024 + ... + 18227.

It is an arithmetic number, because the mean of its divisors is an integer number (2326632).

Almost surely, 2^21221102 is an apocalyptic number.

21221102 is a deficient number, since it is larger than the sum of its proper divisors (16005010).

21221102 is a wasteful number, since it uses less digits than its factorization.

21221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35303.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 21221102 is about 4606.6367341044. The cubic root of 21221102 is about 276.8572989820.

Adding to 21221102 its reverse (20112212), we get a palindrome (41333314).

The spelling of 21221102 in words is "twenty-one million, two hundred twenty-one thousand, one hundred two".