12011445431 has 2 divisors, whose sum is σ = 12011445432. Its totient is φ = 12011445430.

The previous prime is 12011445389. The next prime is 12011445451. The reversal of 12011445431 is 13454411021.

It is a strong prime.

It is an emirp because it is prime and its reverse (13454411021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12011445431 - 2⁶ = 12011445367 is a prime.

It is a super-2 number, since 2×12011445431² (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 12011445431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011445451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005722715 + 6005722716.

It is an arithmetic number, because the mean of its divisors is an integer number (6005722716).

Almost surely, 2^12011445431 is an apocalyptic number.

12011445431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011445431 is an equidigital number, since it uses as much as digits as its factorization.

12011445431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 12011445431 its reverse (13454411021), we get a palindrome (25465856452).

The spelling of 12011445431 in words is "twelve billion, eleven million, four hundred forty-five thousand, four hundred thirty-one".