201211222 has 16 divisors (see below), whose sum is σ = 325801440. Its totient is φ = 92912512.

The previous prime is 201211189. The next prime is 201211229. The reversal of 201211222 is 222112102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74083 + ... + 76750.

It is an arithmetic number, because the mean of its divisors is an integer number (20362590).

Almost surely, 2^201211222 is an apocalyptic number.

201211222 is a deficient number, since it is larger than the sum of its proper divisors (124590218).

201211222 is a wasteful number, since it uses less digits than its factorization.

201211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150887.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 201211222 is about 14184.8941483537. The cubic root of 201211222 is about 585.9817173296.

Adding to 201211222 its reverse (222112102), we get a palindrome (423323324).

The spelling of 201211222 in words is "two hundred one million, two hundred eleven thousand, two hundred twenty-two".