21214210012 has 24 divisors (see below), whose sum is σ = 37871820896. Its totient is φ = 10395813888.

The previous prime is 21214209997. The next prime is 21214210033. The reversal of 21214210012 is 21001241212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225453 + ... + 305380.

Almost surely, 2^21214210012 is an apocalyptic number.

It is an amenable number.

21214210012 is a deficient number, since it is larger than the sum of its proper divisors (16657610884).

21214210012 is a wasteful number, since it uses less digits than its factorization.

21214210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531037 (or 531035 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21214210012 its reverse (21001241212), we get a palindrome (42215451224).

The spelling of 21214210012 in words is "twenty-one billion, two hundred fourteen million, two hundred ten thousand, twelve".