212015211 has 16 divisors (see below), whose sum is σ = 304966944. Its totient is φ = 130517504.

The previous prime is 212015207. The next prime is 212015239. The reversal of 212015211 is 112510212.

It is a cyclic number.

It is not a de Polignac number, because 212015211 - 2² = 212015207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212015411) 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 15 ways as a sum of consecutive naturals, for example, 36516 + ... + 41921.

It is an arithmetic number, because the mean of its divisors is an integer number (19060434).

Almost surely, 2^212015211 is an apocalyptic number.

212015211 is a deficient number, since it is larger than the sum of its proper divisors (92951733).

212015211 is a wasteful number, since it uses less digits than its factorization.

212015211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78510.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 212015211 is about 14560.7421170763. The cubic root of 212015211 is about 596.2874563006.

Adding to 212015211 its reverse (112510212), we get a palindrome (324525423).

It can be divided in two parts, 212015 and 211, that added together give a triangular number (212226 = T₆₅₁).

The spelling of 212015211 in words is "two hundred twelve million, fifteen thousand, two hundred eleven".