12197719211 has 4 divisors (see below), whose sum is σ = 12352120800. Its totient is φ = 12043317624.

The previous prime is 12197719207. The next prime is 12197719217. The reversal of 12197719211 is 11291779121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11291779121 = 7 ⋅1613111303.

It is a cyclic number.

It is not a de Polignac number, because 12197719211 - 2² = 12197719207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12197719217) 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, 77200676 + ... + 77200833.

It is an arithmetic number, because the mean of its divisors is an integer number (3088030200).

Almost surely, 2^12197719211 is an apocalyptic number.

12197719211 is a deficient number, since it is larger than the sum of its proper divisors (154401589).

12197719211 is an equidigital number, since it uses as much as digits as its factorization.

12197719211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154401588.

The product of its digits is 15876, while the sum is 41.

The spelling of 12197719211 in words is "twelve billion, one hundred ninety-seven million, seven hundred nineteen thousand, two hundred eleven".