11011211201209 has 2 divisors, whose sum is σ = 11011211201210. Its totient is φ = 11011211201208.

The previous prime is 11011211201191. The next prime is 11011211201227. The reversal of 11011211201209 is 90210211211011.

It is a happy number.

11011211201209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (11011211201191) and next prime (11011211201227).

It can be written as a sum of positive squares in only one way, i.e., 10298996732025 + 712214469184 = 3209205^2 + 843928^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011211201209 - 2⁹ = 11011211200697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11011211201209.

It is not a weakly prime, because it can be changed into another prime (11011211201279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505605600604 + 5505605600605.

It is an arithmetic number, because the mean of its divisors is an integer number (5505605600605).

Almost surely, 2^{11011211201209} is an apocalyptic number.

It is an amenable number.

11011211201209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011211201209 is an equidigital number, since it uses as much as digits as its factorization.

11011211201209 is an evil number, because the sum of its binary digits is even.

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

The spelling of 11011211201209 in words is "eleven trillion, eleven billion, two hundred eleven million, two hundred one thousand, two hundred nine".