21110122 has 16 divisors (see below), whose sum is σ = 34624512.
Its totient is φ = 9573120.
The previous prime is 21110099. The next prime is 21110123. The reversal of 21110122 is 22101112.
Adding to 21110122 its reverse (22101112), we get a palindrome (43211234).
It is a junction number, because it is equal to n+sod(n) for n = 21110099 and 21110108.
It is not an unprimeable number, because it can be changed into a prime (21110123) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11863 + ... + 13525.
It is an arithmetic number, because the mean of its divisors is an integer number (2164032).
Almost surely, 221110122 is an apocalyptic number.
21110122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
21110122 is a deficient number, since it is larger than the sum of its proper divisors (13514390).
21110122 is a wasteful number, since it uses less digits than its factorization.
21110122 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2253.
The product of its (nonzero) digits is 8, while the sum is 10.
The square root of 21110122 is about 4594.5752796096.
The cubic root of 21110122 is about 276.3738283131.
The spelling of 21110122 in words is "twenty-one million, one hundred ten thousand, one hundred twenty-two".