111511424425 has 6 divisors (see below), whose sum is σ = 138274166318. Its totient is φ = 89209139520.

The previous prime is 111511424389. The next prime is 111511424429. The reversal of 111511424425 is 524424115111.

It can be written as a sum of positive squares in 3 ways, for example, as 6054707344 + 105456717081 = 77812^2 + 324741^2 .

It is not a de Polignac number, because 111511424425 - 2¹¹ = 111511422377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111511424429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2230228464 + ... + 2230228513.

Almost surely, 2^111511424425 is an apocalyptic number.

It is an amenable number.

111511424425 is a deficient number, since it is larger than the sum of its proper divisors (26762741893).

111511424425 is an equidigital number, since it uses as much as digits as its factorization.

111511424425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460456987 (or 4460456982 counting only the distinct ones).

The product of its digits is 6400, while the sum is 31.

Adding to 111511424425 its reverse (524424115111), we get a palindrome (635935539536).

The spelling of 111511424425 in words is "one hundred eleven billion, five hundred eleven million, four hundred twenty-four thousand, four hundred twenty-five".