12231031211 has 4 divisors (see below), whose sum is σ = 13978321392. Its totient is φ = 10483741032.

The previous prime is 12231031199. The next prime is 12231031217. The reversal of 12231031211 is 11213013221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11213013221 = 17 ⋅659589013.

It is a cyclic number.

It is not a de Polignac number, because 12231031211 - 2²² = 12226836907 is a prime.

It is a super-2 number, since 2×12231031211² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12231031211.

It is not an unprimeable number, because it can be changed into a prime (12231031217) 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, 873645080 + ... + 873645093.

It is an arithmetic number, because the mean of its divisors is an integer number (3494580348).

Almost surely, 2^12231031211 is an apocalyptic number.

12231031211 is a deficient number, since it is larger than the sum of its proper divisors (1747290181).

12231031211 is an equidigital number, since it uses as much as digits as its factorization.

12231031211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747290180.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12231031211 its reverse (11213013221), we get a palindrome (23444044432).

The spelling of 12231031211 in words is "twelve billion, two hundred thirty-one million, thirty-one thousand, two hundred eleven".