201112212221 has 8 divisors (see below), whose sum is σ = 209884953600. Its totient is φ = 192341865232.

The previous prime is 201112212179. The next prime is 201112212229. The reversal of 201112212221 is 122212211102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201112212221 - 2¹⁰ = 201112211197 is a prime.

It is a super-2 number, since 2×201112212221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201112212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201112212229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425885 + ... + 763938.

It is an arithmetic number, because the mean of its divisors is an integer number (26235619200).

Almost surely, 2^201112212221 is an apocalyptic number.

It is an amenable number.

201112212221 is a deficient number, since it is larger than the sum of its proper divisors (8772741379).

201112212221 is a wasteful number, since it uses less digits than its factorization.

201112212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197195.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201112212221 its reverse (122212211102), we get a palindrome (323324423323).

The spelling of 201112212221 in words is "two hundred one billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty-one".