11021002011221 has 2 divisors, whose sum is σ = 11021002011222. Its totient is φ = 11021002011220.

The previous prime is 11021002011209. The next prime is 11021002011233. The reversal of 11021002011221 is 12211020012011.

It is a balanced prime because it is at equal distance from previous prime (11021002011209) and next prime (11021002011233).

It can be written as a sum of positive squares in only one way, i.e., 10526812695025 + 494189316196 = 3244505^2 + 702986^2 .

It is an emirp because it is prime and its reverse (12211020012011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11021002011221 - 2¹⁸ = 11021001749077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11021002011196 and 11021002011205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11021002011521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510501005610 + 5510501005611.

It is an arithmetic number, because the mean of its divisors is an integer number (5510501005611).

Almost surely, 2^{11021002011221} is an apocalyptic number.

It is an amenable number.

11021002011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021002011221 is an equidigital number, since it uses as much as digits as its factorization.

11021002011221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11021002011221 its reverse (12211020012011), we get a palindrome (23232022023232).

The spelling of 11021002011221 in words is "eleven trillion, twenty-one billion, two million, eleven thousand, two hundred twenty-one".