221020221011 has 8 divisors (see below), whose sum is σ = 221427874224. Its totient is φ = 220612654080.

The previous prime is 221020221001. The next prime is 221020221061. The reversal of 221020221011 is 110122020122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221020221011 - 2¹⁴ = 221020204627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020221001) 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 7 ways as a sum of consecutive naturals, for example, 7441751 + ... + 7471391.

It is an arithmetic number, because the mean of its divisors is an integer number (27678484278).

Almost surely, 2^221020221011 is an apocalyptic number.

221020221011 is a deficient number, since it is larger than the sum of its proper divisors (407653213).

221020221011 is a wasteful number, since it uses less digits than its factorization.

221020221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43141.

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

Adding to 221020221011 its reverse (110122020122), we get a palindrome (331142241133).

The spelling of 221020221011 in words is "two hundred twenty-one billion, twenty million, two hundred twenty-one thousand, eleven".