12031322431 has 2 divisors, whose sum is σ = 12031322432.
Its totient is φ = 12031322430.
The previous prime is 12031322417. The next prime is 12031322473. The reversal of 12031322431 is 13422313021.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 12031322431 - 211 = 12031320383 is a prime.
It is a super-2 number, since 2×120313224312 (a number of 21 digits) contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12031322231) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015661215 + 6015661216.
It is an arithmetic number, because the mean of its divisors is an integer number (6015661216).
Almost surely, 212031322431 is an apocalyptic number.
12031322431 is a deficient number, since it is larger than the sum of its proper divisors (1).
12031322431 is an equidigital number, since it uses as much as digits as its factorization.
12031322431 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 864, while the sum is 22.
Adding to 12031322431 its reverse (13422313021), we get a palindrome (25453635452).
The spelling of 12031322431 in words is "twelve billion, thirty-one million, three hundred twenty-two thousand, four hundred thirty-one".