111471125009 has 2 divisors, whose sum is σ = 111471125010. Its totient is φ = 111471125008.

The previous prime is 111471124991. The next prime is 111471125047. The reversal of 111471125009 is 900521174111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111453819409 + 17305600 = 333847^2 + 4160^2 .

It is a cyclic number.

It is not a de Polignac number, because 111471125009 - 2²⁰ = 111470076433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111471125609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55735562504 + 55735562505.

It is an arithmetic number, because the mean of its divisors is an integer number (55735562505).

Almost surely, 2^111471125009 is an apocalyptic number.

It is an amenable number.

111471125009 is a deficient number, since it is larger than the sum of its proper divisors (1).

111471125009 is an equidigital number, since it uses as much as digits as its factorization.

111471125009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 32.

The spelling of 111471125009 in words is "one hundred eleven billion, four hundred seventy-one million, one hundred twenty-five thousand, nine".