21201412 has 12 divisors (see below), whose sum is σ = 37191196. Its totient is φ = 10575360.

The previous prime is 21201379. The next prime is 21201419. The reversal of 21201412 is 21410212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3779136 + 17422276 = 1944^2 + 4174^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21201392 and 21201401.

It is not an unprimeable number, because it can be changed into a prime (21201419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4389 + ... + 7852.

Almost surely, 2^21201412 is an apocalyptic number.

It is an amenable number.

21201412 is a deficient number, since it is larger than the sum of its proper divisors (15989784).

21201412 is a wasteful number, since it uses less digits than its factorization.

21201412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12678 (or 12676 counting only the distinct ones).

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

The square root of 21201412 is about 4604.4991041372. The cubic root of 21201412 is about 276.7716451347.

Adding to 21201412 its reverse (21410212), we get a palindrome (42611624).

The spelling of 21201412 in words is "twenty-one million, two hundred one thousand, four hundred twelve".