11121323209 has 2 divisors, whose sum is σ = 11121323210. Its totient is φ = 11121323208.

The previous prime is 11121323179. The next prime is 11121323231. The reversal of 11121323209 is 90232312111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8270083600 + 2851239609 = 90940^2 + 53397^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121323209 - 2³¹ = 8973839561 is a prime.

It is not a weakly prime, because it can be changed into another prime (11121323309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560661604 + 5560661605.

It is an arithmetic number, because the mean of its divisors is an integer number (5560661605).

Almost surely, 2^11121323209 is an apocalyptic number.

It is an amenable number.

11121323209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121323209 is an equidigital number, since it uses as much as digits as its factorization.

11121323209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 11121323209 in words is "eleven billion, one hundred twenty-one million, three hundred twenty-three thousand, two hundred nine".