21014212 has 12 divisors (see below), whose sum is σ = 38043180. Its totient is φ = 10144736.

The previous prime is 21014179. The next prime is 21014233. The reversal of 21014212 is 21241012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10863616 + 10150596 = 3296^2 + 3186^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21014192 and 21014201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90463 + ... + 90694.

It is an arithmetic number, because the mean of its divisors is an integer number (3170265).

Almost surely, 2^21014212 is an apocalyptic number.

It is an amenable number.

21014212 is a deficient number, since it is larger than the sum of its proper divisors (17028968).

21014212 is a wasteful number, since it uses less digits than its factorization.

21014212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181190 (or 181188 counting only the distinct ones).

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

The square root of 21014212 is about 4584.1260890163. The cubic root of 21014212 is about 275.9546414293.

Adding to 21014212 its reverse (21241012), we get a palindrome (42255224).

The spelling of 21014212 in words is "twenty-one million, fourteen thousand, two hundred twelve".