21203630212 has 12 divisors (see below), whose sum is σ = 37107383040. Its totient is φ = 10601520776.

The previous prime is 21203630191. The next prime is 21203630221.

21203630212 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209589 + ... + 293827.

It is an arithmetic number, because the mean of its divisors is an integer number (3092281920).

Almost surely, 2^21203630212 is an apocalyptic number.

It is an amenable number.

21203630212 is a deficient number, since it is larger than the sum of its proper divisors (15903752828).

21203630212 is a wasteful number, since it uses less digits than its factorization.

21203630212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147170 (or 147168 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The spelling of 21203630212 in words is "twenty-one billion, two hundred three million, six hundred thirty thousand, two hundred twelve".