11011001000221 has 2 divisors, whose sum is σ = 11011001000222. Its totient is φ = 11011001000220.

The previous prime is 11011001000191. The next prime is 11011001000297. The reversal of 11011001000221 is 12200010011011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9001380052900 + 2009620947321 = 3000230^2 + 1417611^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011001000221 - 2¹³ = 11011000992029 is a prime.

It is a super-3 number, since 3×11011001000221³ (a number of 40 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11011001000198 and 11011001000207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011001000821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505500500110 + 5505500500111.

It is an arithmetic number, because the mean of its divisors is an integer number (5505500500111).

Almost surely, 2^{11011001000221} is an apocalyptic number.

It is an amenable number.

11011001000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011001000221 is an equidigital number, since it uses as much as digits as its factorization.

11011001000221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11011001000221 its reverse (12200010011011), we get a palindrome (23211011011232).

The spelling of 11011001000221 in words is "eleven trillion, eleven billion, one million, two hundred twenty-one", and thus it is an aban number.