11209999959 has 12 divisors (see below), whose sum is σ = 16194118200. Its totient is φ = 7472458224.

The previous prime is 11209999901. The next prime is 11209999963. The reversal of 11209999959 is 95999990211.

It is not a de Polignac number, because 11209999959 - 2¹⁹ = 11209475671 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11209999896 and 11209999905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11209991959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13612 + ... + 150350.

It is an arithmetic number, because the mean of its divisors is an integer number (1349509850).

Almost surely, 2^11209999959 is an apocalyptic number.

11209999959 is a deficient number, since it is larger than the sum of its proper divisors (4984118241).

11209999959 is a wasteful number, since it uses less digits than its factorization.

11209999959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145854 (or 145851 counting only the distinct ones).

The product of its (nonzero) digits is 5314410, while the sum is 63.

The spelling of 11209999959 in words is "eleven billion, two hundred nine million, nine hundred ninety-nine thousand, nine hundred fifty-nine".