21115022 has 8 divisors (see below), whose sum is σ = 31746000. Its totient is φ = 10533024.

The previous prime is 21115013. The next prime is 21115027. The reversal of 21115022 is 22051112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21114988 and 21115006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11147 + ... + 12902.

It is an arithmetic number, because the mean of its divisors is an integer number (3968250).

Almost surely, 2^21115022 is an apocalyptic number.

21115022 is a deficient number, since it is larger than the sum of its proper divisors (10630978).

21115022 is a wasteful number, since it uses less digits than its factorization.

21115022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24490.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 21115022 is about 4595.1084862057. The cubic root of 21115022 is about 276.3952102674.

Adding to 21115022 its reverse (22051112), we get a palindrome (43166134).

The spelling of 21115022 in words is "twenty-one million, one hundred fifteen thousand, twenty-two".