221101211020201 has 32 divisors (see below), whose sum is σ = 223659727479936. Its totient is φ = 218558278848000.

The previous prime is 221101211020181. The next prime is 221101211020223. The reversal of 221101211020201 is 102020112101122.

It is not a de Polignac number, because 221101211020201 - 2¹¹ = 221101211018153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221101211020601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80664431691 + ... + 80664434431.

It is an arithmetic number, because the mean of its divisors is an integer number (6989366483748).

Almost surely, 2^{221101211020201} is an apocalyptic number.

It is an amenable number.

221101211020201 is a deficient number, since it is larger than the sum of its proper divisors (2558516459735).

221101211020201 is a wasteful number, since it uses less digits than its factorization.

221101211020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433.

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

Adding to 221101211020201 its reverse (102020112101122), we get a palindrome (323121323121323).

The spelling of 221101211020201 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred eleven million, twenty thousand, two hundred one".