22421100 has 72 divisors (see below), whose sum is σ = 69874000. Its totient is φ = 5518080.

The previous prime is 22421053. The next prime is 22421107. The reversal of 22421100 is 112422.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22421107) 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 23 ways as a sum of consecutive naturals, for example, 1026 + ... + 6774.

Almost surely, 2^22421100 is an apocalyptic number.

22421100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22421100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34937000).

22421100 is an abundant number, since it is smaller than the sum of its proper divisors (47452900).

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

22421100 is a wasteful number, since it uses less digits than its factorization.

22421100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779 (or 5772 counting only the distinct ones).

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

The square root of 22421100 is about 4735.0923961418. The cubic root of 22421100 is about 281.9804322220.

Adding to 22421100 its reverse (112422), we get a palindrome (22533522).

The spelling of 22421100 in words is "twenty-two million, four hundred twenty-one thousand, one hundred".