12219940609 has 4 divisors (see below), whose sum is σ = 12300867520. Its totient is φ = 12139013700.

The previous prime is 12219940547. The next prime is 12219940613. The reversal of 12219940609 is 90604991221.

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 12219940609 - 2¹¹ = 12219938561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12219940699) 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, 40463229 + ... + 40463530.

It is an arithmetic number, because the mean of its divisors is an integer number (3075216880).

Almost surely, 2^12219940609 is an apocalyptic number.

It is an amenable number.

12219940609 is a deficient number, since it is larger than the sum of its proper divisors (80926911).

12219940609 is an equidigital number, since it uses as much as digits as its factorization.

12219940609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80926910.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 12219940609 in words is "twelve billion, two hundred nineteen million, nine hundred forty thousand, six hundred nine".