11111201220109 has 2 divisors, whose sum is σ = 11111201220110. Its totient is φ = 11111201220108.

The previous prime is 11111201220061. The next prime is 11111201220167. The reversal of 11111201220109 is 90102210211111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10813245722500 + 297955497609 = 3288350^2 + 545853^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111201220109 - 2²¹ = 11111199122957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11111201220109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111201220179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555600610054 + 5555600610055.

It is an arithmetic number, because the mean of its divisors is an integer number (5555600610055).

Almost surely, 2^{11111201220109} is an apocalyptic number.

It is an amenable number.

11111201220109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111201220109 is an equidigital number, since it uses as much as digits as its factorization.

11111201220109 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 11111201220109 in words is "eleven trillion, one hundred eleven billion, two hundred one million, two hundred twenty thousand, one hundred nine".