201201212221 has 8 divisors (see below), whose sum is σ = 201712896000. Its totient is φ = 200690115600.

The previous prime is 201201212207. The next prime is 201201212249. The reversal of 201201212221 is 122212102102.

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 201201212221 - 2⁹ = 201201211709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201201212195 and 201201212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201212321) 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, 543535 + ... + 835363.

It is an arithmetic number, because the mean of its divisors is an integer number (25214112000).

Almost surely, 2^201201212221 is an apocalyptic number.

It is an amenable number.

201201212221 is a deficient number, since it is larger than the sum of its proper divisors (511683779).

201201212221 is a wasteful number, since it uses less digits than its factorization.

201201212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293579.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201201212221 its reverse (122212102102), we get a palindrome (323413314323).

The spelling of 201201212221 in words is "two hundred one billion, two hundred one million, two hundred twelve thousand, two hundred twenty-one".