201222201221 has 8 divisors (see below), whose sum is σ = 201354484320. Its totient is φ = 201089961072.

The previous prime is 201222201217. The next prime is 201222201239. The reversal of 201222201221 is 122102222102.

It is a happy number.

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 201222201221 - 2² = 201222201217 is a prime.

It is a super-2 number, since 2×201222201221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201222201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222401221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17517746 + ... + 17529228.

It is an arithmetic number, because the mean of its divisors is an integer number (25169310540).

Almost surely, 2^201222201221 is an apocalyptic number.

It is an amenable number.

201222201221 is a deficient number, since it is larger than the sum of its proper divisors (132283099).

201222201221 is a wasteful number, since it uses less digits than its factorization.

201222201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21475.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 201222201221 its reverse (122102222102), we get a palindrome (323324423323).

The spelling of 201222201221 in words is "two hundred one billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-one".