11101212012109 has 2 divisors, whose sum is σ = 11101212012110. Its totient is φ = 11101212012108.

The previous prime is 11101212012091. The next prime is 11101212012133. The reversal of 11101212012109 is 90121021210111.

It is a happy number.

11101212012109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (11101212012091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11028310392100 + 72901620009 = 3320890^2 + 270003^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101212012109 - 2²¹ = 11101209914957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11101212012109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101212012169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550606006054 + 5550606006055.

It is an arithmetic number, because the mean of its divisors is an integer number (5550606006055).

Almost surely, 2^{11101212012109} is an apocalyptic number.

It is an amenable number.

11101212012109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101212012109 is an equidigital number, since it uses as much as digits as its factorization.

11101212012109 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 11101212012109 in words is "eleven trillion, one hundred one billion, two hundred twelve million, twelve thousand, one hundred nine".