211021212 has 24 divisors (see below), whose sum is σ = 505691536. Its totient is φ = 68439168.

The previous prime is 211021199. The next prime is 211021231. The reversal of 211021212 is 212120112.

211021212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237193 + ... + 238080.

Almost surely, 2^211021212 is an apocalyptic number.

It is an amenable number.

211021212 is an abundant number, since it is smaller than the sum of its proper divisors (294670324).

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

211021212 is a wasteful number, since it uses less digits than its factorization.

211021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475317 (or 475315 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 211021212 is about 14526.5691751356. The cubic root of 211021212 is about 595.3541304537.

Adding to 211021212 its reverse (212120112), we get a palindrome (423141324).

The spelling of 211021212 in words is "two hundred eleven million, twenty-one thousand, two hundred twelve".