211921012 has 12 divisors (see below), whose sum is σ = 370976256. Its totient is φ = 105927800.

The previous prime is 211921007. The next prime is 211921033. The reversal of 211921012 is 210129112.

It is a happy number.

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, 11853 + ... + 23755.

It is an arithmetic number, because the mean of its divisors is an integer number (30914688).

Almost surely, 2^211921012 is an apocalyptic number.

It is an amenable number.

211921012 is a deficient number, since it is larger than the sum of its proper divisors (159055244).

211921012 is a wasteful number, since it uses less digits than its factorization.

211921012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16358 (or 16356 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 211921012 is about 14557.5070668023. The cubic root of 211921012 is about 596.1991324445.

The spelling of 211921012 in words is "two hundred eleven million, nine hundred twenty-one thousand, twelve".