21022106 has 16 divisors (see below), whose sum is σ = 36547200. Its totient is φ = 8882160.

The previous prime is 21022103. The next prime is 21022117. The reversal of 21022106 is 60122012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (21022103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9581 + ... + 11568.

It is an arithmetic number, because the mean of its divisors is an integer number (2284200).

Almost surely, 2^21022106 is an apocalyptic number.

21022106 is a deficient number, since it is larger than the sum of its proper divisors (15525094).

21022106 is a wasteful number, since it uses less digits than its factorization.

21022106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21229.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21022106 is about 4584.9870228824. The cubic root of 21022106 is about 275.9891912731.

Adding to 21022106 its reverse (60122012), we get a palindrome (81144118).

The spelling of 21022106 in words is "twenty-one million, twenty-two thousand, one hundred six".