12011202209 has 4 divisors (see below), whose sum is σ = 12533428416. Its totient is φ = 11488976004.

The previous prime is 12011202179. The next prime is 12011202211. The reversal of 12011202209 is 90220211021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12011202209 - 2⁸ = 12011201953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011202239) 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, 261113069 + ... + 261113114.

It is an arithmetic number, because the mean of its divisors is an integer number (3133357104).

Almost surely, 2^12011202209 is an apocalyptic number.

It is an amenable number.

12011202209 is a deficient number, since it is larger than the sum of its proper divisors (522226207).

12011202209 is an equidigital number, since it uses as much as digits as its factorization.

12011202209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522226206.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 12011202209 in words is "twelve billion, eleven million, two hundred two thousand, two hundred nine".