21106022 has 16 divisors (see below), whose sum is σ = 36321792. Its totient is φ = 9010440.

The previous prime is 21105977. The next prime is 21106037. The reversal of 21106022 is 22060112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21105988 and 21106006.

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, 1013 + ... + 6575.

It is an arithmetic number, because the mean of its divisors is an integer number (2270112).

Almost surely, 2^21106022 is an apocalyptic number.

21106022 is a deficient number, since it is larger than the sum of its proper divisors (15215770).

21106022 is a wasteful number, since it uses less digits than its factorization.

21106022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5843.

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

The square root of 21106022 is about 4594.1290795971. The cubic root of 21106022 is about 276.3559347474.

Adding to 21106022 its reverse (22060112), we get a palindrome (43166134).

The spelling of 21106022 in words is "twenty-one million, one hundred six thousand, twenty-two".