211331212 has 12 divisors (see below), whose sum is σ = 373985640. Its totient is φ = 104478176.

The previous prime is 211331203. The next prime is 211331227. The reversal of 211331212 is 212133112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296458 + ... + 297169.

It is an arithmetic number, because the mean of its divisors is an integer number (31165470).

Almost surely, 2^211331212 is an apocalyptic number.

It is an amenable number.

211331212 is a deficient number, since it is larger than the sum of its proper divisors (162654428).

211331212 is a wasteful number, since it uses less digits than its factorization.

211331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593720 (or 593718 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 211331212 is about 14537.2353630255. The cubic root of 211331212 is about 595.6455221370.

Adding to 211331212 its reverse (212133112), we get a palindrome (423464324).

The spelling of 211331212 in words is "two hundred eleven million, three hundred thirty-one thousand, two hundred twelve".