201221210102201 has 16 divisors (see below), whose sum is σ = 213236112600000. Its totient is φ = 189348771940416.

The previous prime is 201221210102183. The next prime is 201221210102203. The reversal of 201221210102201 is 102201012122102.

It is a cyclic number.

It is not a de Polignac number, because 201221210102201 - 2⁶ = 201221210102137 is a prime.

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 201221210102201.

It is not an unprimeable number, because it can be changed into a prime (201221210102203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240951395 + ... + 241785063.

It is an arithmetic number, because the mean of its divisors is an integer number (13327257037500).

Almost surely, 2^{201221210102201} is an apocalyptic number.

It is an amenable number.

201221210102201 is a deficient number, since it is larger than the sum of its proper divisors (12014902497799).

201221210102201 is a wasteful number, since it uses less digits than its factorization.

201221210102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919096.

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

Adding to 201221210102201 its reverse (102201012122102), we get a palindrome (303422222224303).

The spelling of 201221210102201 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred ten million, one hundred two thousand, two hundred one".