221201100200001 has 16 divisors (see below), whose sum is σ = 297845090265600. Its totient is φ = 146014888884480.

The previous prime is 221201100199903. The next prime is 221201100200033. The reversal of 221201100200001 is 100002001102122.

It is not a de Polignac number, because 221201100200001 - 2²² = 221201096005697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221201100200001.

It is not an unprimeable number, because it can be changed into a prime (221201100202001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328882326 + ... + 329554223.

It is an arithmetic number, because the mean of its divisors is an integer number (18615318141600).

Almost surely, 2^{221201100200001} is an apocalyptic number.

It is an amenable number.

221201100200001 is a deficient number, since it is larger than the sum of its proper divisors (76643990065599).

221201100200001 is a wasteful number, since it uses less digits than its factorization.

221201100200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658437656.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221201100200001 its reverse (100002001102122), we get a palindrome (321203101302123).

The spelling of 221201100200001 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred million, two hundred thousand, one".