21841122 has 16 divisors (see below), whose sum is σ = 45581760. Its totient is φ = 6963792.

The previous prime is 21841121. The next prime is 21841133. The reversal of 21841122 is 22114812.

It is a super-2 number, since 2×21841122² = 954069220437768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21841121) 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, 78997 + ... + 79272.

It is an arithmetic number, because the mean of its divisors is an integer number (2848860).

Almost surely, 2^21841122 is an apocalyptic number.

21841122 is an abundant number, since it is smaller than the sum of its proper divisors (23740638).

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

21841122 is a wasteful number, since it uses less digits than its factorization.

21841122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158297.

The product of its digits is 256, while the sum is 21.

The square root of 21841122 is about 4673.4486195956. The cubic root of 21841122 is about 279.5277839941.

Adding to 21841122 its reverse (22114812), we get a palindrome (43955934).

The spelling of 21841122 in words is "twenty-one million, eight hundred forty-one thousand, one hundred twenty-two".