12111211219 has 4 divisors (see below), whose sum is σ = 12277118296. Its totient is φ = 11945304144.

The previous prime is 12111211201. The next prime is 12111211289. The reversal of 12111211219 is 91211211121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91211211121 = 19 ⋅4800590059.

It is a cyclic number.

It is not a de Polignac number, because 12111211219 - 2⁵ = 12111211187 is a prime.

It is a super-2 number, since 2×12111211219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12111211219.

It is not an unprimeable number, because it can be changed into a prime (12111211289) 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, 82953429 + ... + 82953574.

It is an arithmetic number, because the mean of its divisors is an integer number (3069279574).

Almost surely, 2^12111211219 is an apocalyptic number.

12111211219 is a deficient number, since it is larger than the sum of its proper divisors (165907077).

12111211219 is an equidigital number, since it uses as much as digits as its factorization.

12111211219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165907076.

The product of its digits is 72, while the sum is 22.

The spelling of 12111211219 in words is "twelve billion, one hundred eleven million, two hundred eleven thousand, two hundred nineteen".