11212011111109 has 2 divisors, whose sum is σ = 11212011111110. Its totient is φ = 11212011111108.

The previous prime is 11212011111083. The next prime is 11212011111127. The reversal of 11212011111109 is 90111111021211.

11212011111109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10998654882084 + 213356229025 = 3316422^2 + 461905^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212011111109 - 2⁷ = 11212011110981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11212011111109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212011112109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606005555554 + 5606005555555.

It is an arithmetic number, because the mean of its divisors is an integer number (5606005555555).

Almost surely, 2^{11212011111109} is an apocalyptic number.

It is an amenable number.

11212011111109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212011111109 is an equidigital number, since it uses as much as digits as its factorization.

11212011111109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 22.

The spelling of 11212011111109 in words is "eleven trillion, two hundred twelve billion, eleven million, one hundred eleven thousand, one hundred nine".