12111142447 has 2 divisors, whose sum is σ = 12111142448. Its totient is φ = 12111142446.

The previous prime is 12111142411. The next prime is 12111142471. The reversal of 12111142447 is 74424111121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111142447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111142247) 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, 6055571223 + 6055571224.

It is an arithmetic number, because the mean of its divisors is an integer number (6055571224).

Almost surely, 2^12111142447 is an apocalyptic number.

12111142447 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111142447 is an equidigital number, since it uses as much as digits as its factorization.

12111142447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 28.

Adding to 12111142447 its reverse (74424111121), we get a palindrome (86535253568).

The spelling of 12111142447 in words is "twelve billion, one hundred eleven million, one hundred forty-two thousand, four hundred forty-seven".