11021011011209 has 4 divisors (see below), whose sum is σ = 11025460352004. Its totient is φ = 11016561670416.

The previous prime is 11021011011173. The next prime is 11021011011229. The reversal of 11021011011209 is 90211011012011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5935070440000 + 5085940571209 = 2436200^2 + 2255203^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021011011209 - 2⁸ = 11021011010953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11021011011229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224666682 + ... + 2224671635.

It is an arithmetic number, because the mean of its divisors is an integer number (2756365088001).

Almost surely, 2^{11021011011209} is an apocalyptic number.

It is an amenable number.

11021011011209 is a deficient number, since it is larger than the sum of its proper divisors (4449340795).

11021011011209 is an equidigital number, since it uses as much as digits as its factorization.

11021011011209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449340794.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 11021011011209 in words is "eleven trillion, twenty-one billion, eleven million, eleven thousand, two hundred nine".