11011212211009 has 2 divisors, whose sum is σ = 11011212211010. Its totient is φ = 11011212211008.

The previous prime is 11011212210853. The next prime is 11011212211057. The reversal of 11011212211009 is 90011221211011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10731540465409 + 279671745600 = 3275903^2 + 528840^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011212211009 - 2¹⁷ = 11011212079937 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011212211079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505606105504 + 5505606105505.

It is an arithmetic number, because the mean of its divisors is an integer number (5505606105505).

Almost surely, 2^{11011212211009} is an apocalyptic number.

It is an amenable number.

11011212211009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011212211009 is an equidigital number, since it uses as much as digits as its factorization.

11011212211009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 11011212211009 in words is "eleven trillion, eleven billion, two hundred twelve million, two hundred eleven thousand, nine".