201211212 has 12 divisors (see below), whose sum is σ = 469492856. Its totient is φ = 67070400.

The previous prime is 201211189. The next prime is 201211229. The reversal of 201211212 is 212112102.

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: 16767601 = 201211212 / (2 + 0 + 1 + 2 + 1 + 1 + 2 + 1 + 2).

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, 8383789 + ... + 8383812.

Almost surely, 2^201211212 is an apocalyptic number.

It is an amenable number.

201211212 is an abundant number, since it is smaller than the sum of its proper divisors (268281644).

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

201211212 is a wasteful number, since it uses less digits than its factorization.

201211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16767608 (or 16767606 counting only the distinct ones).

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

The square root of 201211212 is about 14184.8937958661. The cubic root of 201211212 is about 585.9817076221.

Adding to 201211212 its reverse (212112102), we get a palindrome (413323314).

The spelling of 201211212 in words is "two hundred one million, two hundred eleven thousand, two hundred twelve".