211021396 has 12 divisors (see below), whose sum is σ = 369521152. Its totient is φ = 105443928.

The previous prime is 211021381. The next prime is 211021417. The reversal of 211021396 is 693120112.

It is a self number, because there is not a number n which added to its sum of digits gives 211021396.

It is a congruent number.

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, 9210 + ... + 22513.

Almost surely, 2^211021396 is an apocalyptic number.

It is an amenable number.

211021396 is a deficient number, since it is larger than the sum of its proper divisors (158499756).

211021396 is a wasteful number, since it uses less digits than its factorization.

211021396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33390 (or 33388 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 211021396 is about 14526.5755083571. The cubic root of 211021396 is about 595.3543034934.

The spelling of 211021396 in words is "two hundred eleven million, twenty-one thousand, three hundred ninety-six".