11020221212221 has 8 divisors (see below), whose sum is σ = 11868493586040. Its totient is φ = 10172029274112.

The previous prime is 11020221212177. The next prime is 11020221212237. The reversal of 11020221212221 is 12221212202011.

It can be written as a sum of positive squares in 4 ways, for example, as 613693624996 + 10406527587225 = 783386^2 + 3225915^2 .

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 11020221212221 - 2¹⁹ = 11020220687933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020221212281) 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, 19824220 + ... + 20372533.

It is an arithmetic number, because the mean of its divisors is an integer number (1483561698255).

Almost surely, 2^{11020221212221} is an apocalyptic number.

It is an amenable number.

11020221212221 is a deficient number, since it is larger than the sum of its proper divisors (848272373819).

11020221212221 is a wasteful number, since it uses less digits than its factorization.

11020221212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40217855.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11020221212221 its reverse (12221212202011), we get a palindrome (23241433414232).

The spelling of 11020221212221 in words is "eleven trillion, twenty billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twenty-one".