21341212 has 6 divisors (see below), whose sum is σ = 37347128. Its totient is φ = 10670604.

The previous prime is 21341191. The next prime is 21341249. The reversal of 21341212 is 21214312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2667648 + ... + 2667655.

Almost surely, 2^21341212 is an apocalyptic number.

It is an amenable number.

21341212 is a deficient number, since it is larger than the sum of its proper divisors (16005916).

21341212 is a wasteful number, since it uses less digits than its factorization.

21341212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335307 (or 5335305 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 21341212 is about 4619.6549654709. The cubic root of 21341212 is about 277.3786478028.

Adding to 21341212 its reverse (21214312), we get a palindrome (42555524).

The spelling of 21341212 in words is "twenty-one million, three hundred forty-one thousand, two hundred twelve".