12182279231 has 4 divisors (see below), whose sum is σ = 12388758600. Its totient is φ = 11975799864.

The previous prime is 12182279171. The next prime is 12182279233. The reversal of 12182279231 is 13297228121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13297228121 = 491 ⋅27081931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12182279231 is a prime.

It is a super-2 number, since 2×12182279231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12182279233) 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, 103239596 + ... + 103239713.

It is an arithmetic number, because the mean of its divisors is an integer number (3097189650).

Almost surely, 2^12182279231 is an apocalyptic number.

12182279231 is a deficient number, since it is larger than the sum of its proper divisors (206479369).

12182279231 is an equidigital number, since it uses as much as digits as its factorization.

12182279231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206479368.

The product of its digits is 24192, while the sum is 38.

The spelling of 12182279231 in words is "twelve billion, one hundred eighty-two million, two hundred seventy-nine thousand, two hundred thirty-one".