21301112 has 16 divisors (see below), whose sum is σ = 45645360. Its totient is φ = 9129024.

The previous prime is 21301097. The next prime is 21301157. The reversal of 21301112 is 21110312.

It is a junction number, because it is equal to n+sod(n) for n = 21301093 and 21301102.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 190133 + ... + 190244.

It is an arithmetic number, because the mean of its divisors is an integer number (2852835).

Almost surely, 2^21301112 is an apocalyptic number.

It is an amenable number.

21301112 is an abundant number, since it is smaller than the sum of its proper divisors (24344248).

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

21301112 is a wasteful number, since it uses less digits than its factorization.

21301112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380390 (or 380386 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 21301112 is about 4615.3127737998. The cubic root of 21301112 is about 277.2048079780.

Adding to 21301112 its reverse (21110312), we get a palindrome (42411424).

The spelling of 21301112 in words is "twenty-one million, three hundred one thousand, one hundred twelve".