212171011 has 8 divisors (see below), whose sum is σ = 231385280. Its totient is φ = 193370112.

The previous prime is 212170997. The next prime is 212171041. The reversal of 212171011 is 110171212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212171011 - 2¹¹ = 212168963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212171041) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 102270 + ... + 104323.

It is an arithmetic number, because the mean of its divisors is an integer number (28923160).

Almost surely, 2^212171011 is an apocalyptic number.

212171011 is a deficient number, since it is larger than the sum of its proper divisors (19214269).

212171011 is a wasteful number, since it uses less digits than its factorization.

212171011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206685.

The product of its (nonzero) digits is 28, while the sum is 16.

The square root of 212171011 is about 14566.0911366090. The cubic root of 212171011 is about 596.4334817331.

The spelling of 212171011 in words is "two hundred twelve million, one hundred seventy-one thousand, eleven".