211990212 has 36 divisors (see below), whose sum is σ = 612416896. Its totient is φ = 60568560.

The previous prime is 211990199. The next prime is 211990231. The reversal of 211990212 is 212099112.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 420364 + ... + 420867.

Almost surely, 2^211990212 is an apocalyptic number.

It is an amenable number.

211990212 is an abundant number, since it is smaller than the sum of its proper divisors (400426684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211990212 is a wasteful number, since it uses less digits than its factorization.

211990212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841248 (or 841243 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 211990212 is about 14559.8836533813. The cubic root of 211990212 is about 596.2640190262.

Subtracting 211990212 from its reverse (212099112), we obtain a square (108900 = 330²).

The spelling of 211990212 in words is "two hundred eleven million, nine hundred ninety thousand, two hundred twelve".