21412120 has 16 divisors (see below), whose sum is σ = 48177360. Its totient is φ = 8564832.

The previous prime is 21412099. The next prime is 21412123. The reversal of 21412120 is 2121412.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21412120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412123) 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 3 ways as a sum of consecutive naturals, for example, 267612 + ... + 267691.

It is an arithmetic number, because the mean of its divisors is an integer number (3011085).

Almost surely, 2^21412120 is an apocalyptic number.

21412120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21412120 is an abundant number, since it is smaller than the sum of its proper divisors (26765240).

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

21412120 is a wasteful number, since it uses less digits than its factorization.

21412120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535314 (or 535310 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 21412120 is about 4627.3232002963. The cubic root of 21412120 is about 277.6855129425.

Adding to 21412120 its reverse (2121412), we get a palindrome (23533532).

The spelling of 21412120 in words is "twenty-one million, four hundred twelve thousand, one hundred twenty".