211201212 has 12 divisors (see below), whose sum is σ = 492802856. Its totient is φ = 70400400.

The previous prime is 211201147. The next prime is 211201223. The reversal of 211201212 is 212102112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 17600101 = 211201212 / (2 + 1 + 1 + 2 + 0 + 1 + 2 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8800039 + ... + 8800062.

Almost surely, 2^211201212 is an apocalyptic number.

It is an amenable number.

211201212 is an abundant number, since it is smaller than the sum of its proper divisors (281601644).

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

211201212 is a wasteful number, since it uses less digits than its factorization.

211201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17600108 (or 17600106 counting only the distinct ones).

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

The square root of 211201212 is about 14532.7633986107. The cubic root of 211201212 is about 595.5233603412.

Adding to 211201212 its reverse (212102112), we get a palindrome (423303324).

The spelling of 211201212 in words is "two hundred eleven million, two hundred one thousand, two hundred twelve".