21041022 has 16 divisors (see below), whose sum is σ = 42134400. Its totient is φ = 7004952.

The previous prime is 21041011. The next prime is 21041029. The reversal of 21041022 is 22014012.

It is a junction number, because it is equal to n+sod(n) for n = 21040989 and 21041007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4729 + ... + 8027.

It is an arithmetic number, because the mean of its divisors is an integer number (2633400).

Almost surely, 2^21041022 is an apocalyptic number.

21041022 is an abundant number, since it is smaller than the sum of its proper divisors (21093378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21041022 is a wasteful number, since it uses less digits than its factorization.

21041022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 21041022 is about 4587.0493784131. The cubic root of 21041022 is about 276.0719461672.

Adding to 21041022 its reverse (22014012), we get a palindrome (43055034).

The spelling of 21041022 in words is "twenty-one million, forty-one thousand, twenty-two".