212252211 has 32 divisors (see below), whose sum is σ = 345408000. Its totient is φ = 128218464.

The previous prime is 212252167. The next prime is 212252219. The reversal of 212252211 is 112252212.

It is not a de Polignac number, because 212252211 - 2⁶ = 212252147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212252219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2805 + ... + 20793.

It is an arithmetic number, because the mean of its divisors is an integer number (10794000).

Almost surely, 2^212252211 is an apocalyptic number.

212252211 is a deficient number, since it is larger than the sum of its proper divisors (133155789).

212252211 is a wasteful number, since it uses less digits than its factorization.

212252211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18040 (or 18034 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 212252211 is about 14568.8781654594. The cubic root of 212252211 is about 596.5095590783.

Subtracting from 212252211 its reverse (112252212), we obtain a palindrome (99999999).

It can be divided in two parts, 21225 and 2211, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 212252211 in words is "two hundred twelve million, two hundred fifty-two thousand, two hundred eleven".