2113043231209 has 4 divisors (see below), whose sum is σ = 2113126274116. Its totient is φ = 2112960188304.

The previous prime is 2113043231207. The next prime is 2113043231263. The reversal of 2113043231209 is 9021323403112.

It is a happy number.

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 1490711576809 + 622331654400 = 1220947^2 + 788880^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113043231209 - 2¹ = 2113043231207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2113043231207) 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, 41483274 + ... + 41534179.

It is an arithmetic number, because the mean of its divisors is an integer number (528281568529).

Almost surely, 2^{2113043231209} is an apocalyptic number.

It is an amenable number.

2113043231209 is a deficient number, since it is larger than the sum of its proper divisors (83042907).

2113043231209 is an equidigital number, since it uses as much as digits as its factorization.

2113043231209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83042906.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 2113043231209 in words is "two trillion, one hundred thirteen billion, forty-three million, two hundred thirty-one thousand, two hundred nine".