111985424791 has 2 divisors, whose sum is σ = 111985424792. Its totient is φ = 111985424790.

The previous prime is 111985424783. The next prime is 111985424809. The reversal of 111985424791 is 197424589111.

It is a weak prime.

It is an emirp because it is prime and its reverse (197424589111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111985424791 - 2³ = 111985424783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111985424731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55992712395 + 55992712396.

It is an arithmetic number, because the mean of its divisors is an integer number (55992712396).

Almost surely, 2^111985424791 is an apocalyptic number.

111985424791 is a deficient number, since it is larger than the sum of its proper divisors (1).

111985424791 is an equidigital number, since it uses as much as digits as its factorization.

111985424791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 52.

The spelling of 111985424791 in words is "one hundred eleven billion, nine hundred eighty-five million, four hundred twenty-four thousand, seven hundred ninety-one".