12011112011209 has 2 divisors, whose sum is σ = 12011112011210. Its totient is φ = 12011112011208.

The previous prime is 12011112011183. The next prime is 12011112011233. The reversal of 12011112011209 is 90211021111021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10858323268809 + 1152788742400 = 3295197^2 + 1073680^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011112011209 - 2¹³ = 12011112003017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12011112011209.

It is not a weakly prime, because it can be changed into another prime (12011112011299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005556005604 + 6005556005605.

It is an arithmetic number, because the mean of its divisors is an integer number (6005556005605).

Almost surely, 2^{12011112011209} is an apocalyptic number.

It is an amenable number.

12011112011209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011112011209 is an equidigital number, since it uses as much as digits as its factorization.

12011112011209 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 12011112011209 in words is "twelve trillion, eleven billion, one hundred twelve million, eleven thousand, two hundred nine".