211121212 has 6 divisors (see below), whose sum is σ = 369462128. Its totient is φ = 105560604.

The previous prime is 211121203. The next prime is 211121213. The reversal of 211121212 is 212121112.

211121212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 211121192 and 211121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26390148 + ... + 26390155.

Almost surely, 2^211121212 is an apocalyptic number.

It is an amenable number.

211121212 is a deficient number, since it is larger than the sum of its proper divisors (158340916).

211121212 is a wasteful number, since it uses less digits than its factorization.

211121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52780307 (or 52780305 counting only the distinct ones).

The product of its digits is 16, while the sum is 13.

The square root of 211121212 is about 14530.0107364035. The cubic root of 211121212 is about 595.4481589333.

Adding to 211121212 its reverse (212121112), we get a palindrome (423242324).

The spelling of 211121212 in words is "two hundred eleven million, one hundred twenty-one thousand, two hundred twelve".