221221201010201 has 16 divisors (see below), whose sum is σ = 256974935587200. Its totient is φ = 186505289182080.

The previous prime is 221221201010197. The next prime is 221221201010207. The reversal of 221221201010201 is 102010102122122.

It is a cyclic number.

It is not a de Polignac number, because 221221201010201 - 2² = 221221201010197 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 221221201010201.

It is not an unprimeable number, because it can be changed into a prime (221221201010207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12137330 + ... + 24284916.

It is an arithmetic number, because the mean of its divisors is an integer number (16060933474200).

Almost surely, 2^{221221201010201} is an apocalyptic number.

It is an amenable number.

221221201010201 is a deficient number, since it is larger than the sum of its proper divisors (35753734576999).

221221201010201 is a wasteful number, since it uses less digits than its factorization.

221221201010201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12190304.

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

Adding to 221221201010201 its reverse (102010102122122), we get a palindrome (323231303132323).

The spelling of 221221201010201 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, ten thousand, two hundred one".