211012 has 12 divisors (see below), whose sum is σ = 374976. Its totient is φ = 103880.

The previous prime is 211007. The next prime is 211039. The reversal of 211012 is 210112.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 210986 and 211004.

It is an unprimeable number.

211012 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88 + ... + 655.

It is an arithmetic number, because the mean of its divisors is an integer number (31248).

2²¹¹⁰¹² is an apocalyptic number.

It is an amenable number.

211012 is a deficient number, since it is larger than the sum of its proper divisors (163964).

211012 is a wasteful number, since it uses less digits than its factorization.

211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 211012 is about 459.3604249388. The cubic root of 211012 is about 59.5345467056.

Adding to 211012 its reverse (210112), we get a palindrome (421124).

Subtracting from 211012 its reverse (210112), we obtain a square (900 = 30²).

The spelling of 211012 in words is "two hundred eleven thousand, twelve", and thus it is an iban number.