12010013209 has 4 divisors (see below), whose sum is σ = 12047900004. Its totient is φ = 11972126416.

The previous prime is 12010013207. The next prime is 12010013227. The reversal of 12010013209 is 90231001021.

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 4588707600 + 7421305609 = 67740^2 + 86147^2 .

It is a cyclic number.

It is not a de Polignac number, because 12010013209 - 2¹ = 12010013207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12010013203) 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, 18942922 + ... + 18943555.

It is an arithmetic number, because the mean of its divisors is an integer number (3011975001).

Almost surely, 2^12010013209 is an apocalyptic number.

It is an amenable number.

12010013209 is a deficient number, since it is larger than the sum of its proper divisors (37886795).

12010013209 is an equidigital number, since it uses as much as digits as its factorization.

12010013209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37886794.

The product of its (nonzero) digits is 108, while the sum is 19.

The spelling of 12010013209 in words is "twelve billion, ten million, thirteen thousand, two hundred nine".