11011044221 has 2 divisors, whose sum is σ = 11011044222. Its totient is φ = 11011044220.

The previous prime is 11011044167. The next prime is 11011044223. The reversal of 11011044221 is 12244011011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6248112025 + 4762932196 = 79045^2 + 69014^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011044221 - 2¹⁴ = 11011027837 is a prime.

Together with 11011044223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11011044221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011044223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505522110 + 5505522111.

It is an arithmetic number, because the mean of its divisors is an integer number (5505522111).

Almost surely, 2^11011044221 is an apocalyptic number.

It is an amenable number.

11011044221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011044221 is an equidigital number, since it uses as much as digits as its factorization.

11011044221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11011044221 its reverse (12244011011), we get a palindrome (23255055232).

The spelling of 11011044221 in words is "eleven billion, eleven million, forty-four thousand, two hundred twenty-one".