12013211231 has 8 divisors (see below), whose sum is σ = 13745992320. Its totient is φ = 10284582168.

The previous prime is 12013211209. The next prime is 12013211237. The reversal of 12013211231 is 13211231021.

12013211231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12013211231 - 2²⁶ = 11946102367 is a prime.

It is a super-2 number, since 2×12013211231² (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 (12013211237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031801 + ... + 1043378.

It is an arithmetic number, because the mean of its divisors is an integer number (1718249040).

Almost surely, 2^12013211231 is an apocalyptic number.

12013211231 is a deficient number, since it is larger than the sum of its proper divisors (1732781089).

12013211231 is an equidigital number, since it uses as much as digits as its factorization.

12013211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076013.

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

Adding to 12013211231 its reverse (13211231021), we get a palindrome (25224442252).

The spelling of 12013211231 in words is "twelve billion, thirteen million, two hundred eleven thousand, two hundred thirty-one".