12231320011 has 4 divisors (see below), whose sum is σ = 12231564192. Its totient is φ = 12231075832.

The previous prime is 12231319993. The next prime is 12231320033. The reversal of 12231320011 is 11002313221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11002313221 = 52313 ⋅210317.

It is a cyclic number.

It is not a de Polignac number, because 12231320011 - 2²³ = 12222931403 is a prime.

It is a super-2 number, since 2×12231320011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12231320071) 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, 16531 + ... + 157276.

It is an arithmetic number, because the mean of its divisors is an integer number (3057891048).

Almost surely, 2^12231320011 is an apocalyptic number.

12231320011 is a deficient number, since it is larger than the sum of its proper divisors (244181).

12231320011 is an equidigital number, since it uses as much as digits as its factorization.

12231320011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244180.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12231320011 its reverse (11002313221), we get a palindrome (23233633232).

The spelling of 12231320011 in words is "twelve billion, two hundred thirty-one million, three hundred twenty thousand, eleven".