11020210212221 has 20 divisors (see below), whose sum is σ = 12903940064700. Its totient is φ = 9410779066752.

The previous prime is 11020210212203. The next prime is 11020210212233. The reversal of 11020210212221 is 12221201202011.

It can be written as a sum of positive squares in 2 ways, for example, as 6144994788100 + 4875215424121 = 2478910^2 + 2207989^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11020210212221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11020210212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020210212251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7885436 + ... + 9177173.

It is an arithmetic number, because the mean of its divisors is an integer number (645197003235).

Almost surely, 2^{11020210212221} is an apocalyptic number.

It is an amenable number.

11020210212221 is a deficient number, since it is larger than the sum of its proper divisors (1883729852479).

11020210212221 is an frugal number, since it uses more digits than its factorization.

11020210212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17062906 (or 17062885 counting only the distinct ones).

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

Adding to 11020210212221 its reverse (12221201202011), we get a palindrome (23241411414232).

The spelling of 11020210212221 in words is "eleven trillion, twenty billion, two hundred ten million, two hundred twelve thousand, two hundred twenty-one".