11101212009 has 24 divisors (see below), whose sum is σ = 16676965760. Its totient is φ = 7109620128.

The previous prime is 11101211987. The next prime is 11101212019. The reversal of 11101212009 is 90021210111.

It is a happy number.

It is not a de Polignac number, because 11101212009 - 2⁸ = 11101211753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11101211982 and 11101212000.

It is not an unprimeable number, because it can be changed into a prime (11101212019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184687 + ... + 237300.

Almost surely, 2^11101212009 is an apocalyptic number.

It is an amenable number.

11101212009 is a deficient number, since it is larger than the sum of its proper divisors (5575753751).

11101212009 is a wasteful number, since it uses less digits than its factorization.

11101212009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422109 (or 422106 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 11101212009 in words is "eleven billion, one hundred one million, two hundred twelve thousand, nine".