201020221101 has 16 divisors (see below), whose sum is σ = 306491321984. Its totient is φ = 114803149824.

The previous prime is 201020221093. The next prime is 201020221111. The reversal of 201020221101 is 101122020102.

It is not a de Polignac number, because 201020221101 - 2³ = 201020221093 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 (201020221111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2693476 + ... + 2767101.

It is an arithmetic number, because the mean of its divisors is an integer number (19155707624).

Almost surely, 2^201020221101 is an apocalyptic number.

201020221101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201020221101 is a deficient number, since it is larger than the sum of its proper divisors (105471100883).

201020221101 is a wasteful number, since it uses less digits than its factorization.

201020221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5462340.

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

Adding to 201020221101 its reverse (101122020102), we get a palindrome (302142241203).

The spelling of 201020221101 in words is "two hundred one billion, twenty million, two hundred twenty-one thousand, one hundred one".