211913684512 has 24 divisors (see below), whose sum is σ = 418225153500. Its totient is φ = 105697772544.

The previous prime is 211913684473. The next prime is 211913684531. The reversal of 211913684512 is 215486319112.

It can be written as a sum of positive squares in 2 ways, for example, as 204770730256 + 7142954256 = 452516^2 + 84516^2 .

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, 8082637 + ... + 8108812.

Almost surely, 2^211913684512 is an apocalyptic number.

It is an amenable number.

211913684512 is a deficient number, since it is larger than the sum of its proper divisors (206311468988).

211913684512 is a wasteful number, since it uses less digits than its factorization.

211913684512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16191868 (or 16191860 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The spelling of 211913684512 in words is "two hundred eleven billion, nine hundred thirteen million, six hundred eighty-four thousand, five hundred twelve".