428312131111 has 2 divisors, whose sum is σ = 428312131112. Its totient is φ = 428312131110.

The previous prime is 428312131109. The next prime is 428312131139. The reversal of 428312131111 is 111131213824.

It is an a-pointer prime, because the next prime (428312131139) can be obtained adding 428312131111 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428312131111 - 2¹ = 428312131109 is a prime.

Together with 428312131109, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 428312131111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428312131151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214156065555 + 214156065556.

It is an arithmetic number, because the mean of its divisors is an integer number (214156065556).

Almost surely, 2^428312131111 is an apocalyptic number.

428312131111 is a deficient number, since it is larger than the sum of its proper divisors (1).

428312131111 is an equidigital number, since it uses as much as digits as its factorization.

428312131111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 28.

Adding to 428312131111 its reverse (111131213824), we get a palindrome (539443344935).

The spelling of 428312131111 in words is "four hundred twenty-eight billion, three hundred twelve million, one hundred thirty-one thousand, one hundred eleven".