201112112009 has 4 divisors (see below), whose sum is σ = 204409031940. Its totient is φ = 197815192080.

The previous prime is 201112111979. The next prime is 201112112011. The reversal of 201112112009 is 900211211102.

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 31631689609 + 169480422400 = 177853^2 + 411680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201112112009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201112112099) 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, 1648459874 + ... + 1648459995.

It is an arithmetic number, because the mean of its divisors is an integer number (51102257985).

Almost surely, 2^201112112009 is an apocalyptic number.

It is an amenable number.

201112112009 is a deficient number, since it is larger than the sum of its proper divisors (3296919931).

201112112009 is an equidigital number, since it uses as much as digits as its factorization.

201112112009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296919930.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 201112112009 in words is "two hundred one billion, one hundred twelve million, one hundred twelve thousand, nine".