11101101020221 has 4 divisors (see below), whose sum is σ = 11101240671292. Its totient is φ = 11100961369152.

The previous prime is 11101101020209. The next prime is 11101101020227. The reversal of 11101101020221 is 12202010110111.

It is a happy number.

11101101020221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9392692562500 + 1708408457721 = 3064750^2 + 1307061^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101101020221 - 2¹⁵ = 11101100987453 is a prime.

It is a super-2 number, since 2×11101101020221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101101020227) 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, 69706230 + ... + 69865303.

It is an arithmetic number, because the mean of its divisors is an integer number (2775310167823).

Almost surely, 2^{11101101020221} is an apocalyptic number.

It is an amenable number.

11101101020221 is a deficient number, since it is larger than the sum of its proper divisors (139651071).

11101101020221 is an equidigital number, since it uses as much as digits as its factorization.

11101101020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139651070.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11101101020221 its reverse (12202010110111), we get a palindrome (23303111130332).

The spelling of 11101101020221 in words is "eleven trillion, one hundred one billion, one hundred one million, twenty thousand, two hundred twenty-one".