221010202020011 has 4 divisors (see below), whose sum is σ = 221066453029800. Its totient is φ = 220953951010224.

The previous prime is 221010202019983. The next prime is 221010202020019. The reversal of 221010202020011 is 110020202010122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221010202020011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221010202020019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28125499001 + ... + 28125506858.

It is an arithmetic number, because the mean of its divisors is an integer number (55266613257450).

Almost surely, 2^{221010202020011} is an apocalyptic number.

221010202020011 is a deficient number, since it is larger than the sum of its proper divisors (56251009789).

221010202020011 is an equidigital number, since it uses as much as digits as its factorization.

221010202020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56251009788.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221010202020011 its reverse (110020202010122), we get a palindrome (331030404030133).

The spelling of 221010202020011 in words is "two hundred twenty-one trillion, ten billion, two hundred two million, twenty thousand, eleven".