221021020211101 has 16 divisors (see below), whose sum is σ = 242100715019328. Its totient is φ = 200106119065600.

The previous prime is 221021020211071. The next prime is 221021020211161. The reversal of 221021020211101 is 101112020120122.

It is not a de Polignac number, because 221021020211101 - 2⁷ = 221021020210973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021020211161) 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, 6198006 + ... + 21919336.

It is an arithmetic number, because the mean of its divisors is an integer number (15131294688708).

Almost surely, 2^{221021020211101} is an apocalyptic number.

It is an amenable number.

221021020211101 is a deficient number, since it is larger than the sum of its proper divisors (21079694808227).

221021020211101 is a wasteful number, since it uses less digits than its factorization.

221021020211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15726572.

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

Adding to 221021020211101 its reverse (101112020120122), we get a palindrome (322133040331223).

The spelling of 221021020211101 in words is "two hundred twenty-one trillion, twenty-one billion, twenty million, two hundred eleven thousand, one hundred one".