12111388047 has 96 divisors (see below), whose sum is σ = 21768155136. Its totient is φ = 6394291200.

The previous prime is 12111388031. The next prime is 12111388057. The reversal of 12111388047 is 74088311121.

It is not a de Polignac number, because 12111388047 - 2⁴ = 12111388031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111388027) 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 in 95 ways as a sum of consecutive naturals, for example, 1194933 + ... + 1205025.

It is an arithmetic number, because the mean of its divisors is an integer number (226751616).

Almost surely, 2^12111388047 is an apocalyptic number.

12111388047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12111388047 is a deficient number, since it is larger than the sum of its proper divisors (9656767089).

12111388047 is a wasteful number, since it uses less digits than its factorization.

12111388047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10181 (or 10178 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

Adding to 12111388047 its reverse (74088311121), we get a palindrome (86199699168).

The spelling of 12111388047 in words is "twelve billion, one hundred eleven million, three hundred eighty-eight thousand, forty-seven".