11021221201009 has 2 divisors, whose sum is σ = 11021221201010. Its totient is φ = 11021221201008.

The previous prime is 11021221200989. The next prime is 11021221201061. The reversal of 11021221201009 is 90010212212011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7416907560000 + 3604313641009 = 2723400^2 + 1898503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021221201009 is a prime.

It is not a weakly prime, because it can be changed into another prime (11021221201609) 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, 5510610600504 + 5510610600505.

It is an arithmetic number, because the mean of its divisors is an integer number (5510610600505).

Almost surely, 2^{11021221201009} is an apocalyptic number.

It is an amenable number.

11021221201009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021221201009 is an equidigital number, since it uses as much as digits as its factorization.

11021221201009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 11021221201009 in words is "eleven trillion, twenty-one billion, two hundred twenty-one million, two hundred one thousand, nine".