11111000001209 has 8 divisors (see below), whose sum is σ = 11175320162952. Its totient is φ = 11046680928640.

The previous prime is 11111000001191. The next prime is 11111000001229. The reversal of 11111000001209 is 90210000011111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 763377901225 + 10347622099984 = 873715^2 + 3216772^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111000001209 - 2²⁴ = 11110983223993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111000001229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29717789 + ... + 30089349.

It is an arithmetic number, because the mean of its divisors is an integer number (1396915020369).

Almost surely, 2^{11111000001209} is an apocalyptic number.

It is an amenable number.

11111000001209 is a deficient number, since it is larger than the sum of its proper divisors (64320161743).

11111000001209 is a wasteful number, since it uses less digits than its factorization.

11111000001209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544587.

The product of its (nonzero) digits is 18, while the sum is 17.

The spelling of 11111000001209 in words is "eleven trillion, one hundred eleven billion, one thousand, two hundred nine".