221001201221101 has 16 divisors (see below), whose sum is σ = 258085801152000. Its totient is φ = 189166138247184.

The previous prime is 221001201221093. The next prime is 221001201221111. The reversal of 221001201221101 is 101122102100122.

It is not a de Polignac number, because 221001201221101 - 2³ = 221001201221093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001201221111) 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, 447819010 + ... + 448312243.

It is an arithmetic number, because the mean of its divisors is an integer number (16130362572000).

Almost surely, 2^{221001201221101} is an apocalyptic number.

It is an amenable number.

221001201221101 is a deficient number, since it is larger than the sum of its proper divisors (37084599930899).

221001201221101 is an frugal number, since it uses more digits than its factorization.

221001201221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896131993 (or 896131979 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221001201221101 its reverse (101122102100122), we get a palindrome (322123303321223).

The spelling of 221001201221101 in words is "two hundred twenty-one trillion, one billion, two hundred one million, two hundred twenty-one thousand, one hundred one".