11201009 has 4 divisors (see below), whose sum is σ = 11249316. Its totient is φ = 11152704.

The previous prime is 11200999. The next prime is 11201017. The reversal of 11201009 is 90010211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5536609 + 5664400 = 2353^2 + 2380^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201009 - 2⁸ = 11200753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11200984 and 11201002.

It is not an unprimeable number, because it can be changed into a prime (11201039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23804 + ... + 24269.

It is an arithmetic number, because the mean of its divisors is an integer number (2812329).

Almost surely, 2^11201009 is an apocalyptic number.

It is an amenable number.

11201009 is a deficient number, since it is larger than the sum of its proper divisors (48307).

11201009 is an equidigital number, since it uses as much as digits as its factorization.

11201009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48306.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 11201009 is about 3346.7908509496. The cubic root of 11201009 is about 223.7445070070.

The spelling of 11201009 in words is "eleven million, two hundred one thousand, nine".