201221234 has 16 divisors (see below), whose sum is σ = 307581408. Its totient is φ = 98706432.

The previous prime is 201221219. The next prime is 201221243. The reversal of 201221234 is 432122102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31517 + ... + 37359.

It is an arithmetic number, because the mean of its divisors is an integer number (19223838).

Almost surely, 2^201221234 is an apocalyptic number.

201221234 is a deficient number, since it is larger than the sum of its proper divisors (106360174).

201221234 is a wasteful number, since it uses less digits than its factorization.

201221234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 201221234 is about 14185.2470545987. The cubic root of 201221234 is about 585.9914363894.

Adding to 201221234 its reverse (432122102), we get a palindrome (633343336).

The spelling of 201221234 in words is "two hundred one million, two hundred twenty-one thousand, two hundred thirty-four".