11121012109 has 2 divisors, whose sum is σ = 11121012110. Its totient is φ = 11121012108.

The previous prime is 11121012107. The next prime is 11121012157. The reversal of 11121012109 is 90121012111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8633197225 + 2487814884 = 92915^2 + 49878^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121012109 - 2¹ = 11121012107 is a prime.

Together with 11121012107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121012107) 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 as a sum of consecutive naturals, namely, 5560506054 + 5560506055.

It is an arithmetic number, because the mean of its divisors is an integer number (5560506055).

Almost surely, 2^11121012109 is an apocalyptic number.

It is an amenable number.

11121012109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121012109 is an equidigital number, since it uses as much as digits as its factorization.

11121012109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 11121012109 in words is "eleven billion, one hundred twenty-one million, twelve thousand, one hundred nine".