11121220201009 has 16 divisors (see below), whose sum is σ = 11187039139920. Its totient is φ = 11055618273280.

The previous prime is 11121220200997. The next prime is 11121220201079. The reversal of 11121220201009 is 90010202212111.

It can be written as a sum of positive squares in 8 ways, for example, as 386849168784 + 10734371032225 = 621972^2 + 3276335^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121220201009 - 2⁵ = 11121220200977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121220201079) 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 in 15 ways as a sum of consecutive naturals, for example, 208029327 + ... + 208082779.

It is an arithmetic number, because the mean of its divisors is an integer number (699189946245).

Almost surely, 2^{11121220201009} is an apocalyptic number.

It is an amenable number.

11121220201009 is a deficient number, since it is larger than the sum of its proper divisors (65818938911).

11121220201009 is an equidigital number, since it uses as much as digits as its factorization.

11121220201009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55460.

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

The spelling of 11121220201009 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty million, two hundred one thousand, nine".