111550404125 has 16 divisors (see below), whose sum is σ = 139224374640. Its totient is φ = 89234252800.

The previous prime is 111550404113. The next prime is 111550404137. The reversal of 111550404125 is 521404055111.

It is an interprime number because it is at equal distance from previous prime (111550404113) and next prime (111550404137).

It can be written as a sum of positive squares in 8 ways, for example, as 102079611001 + 9470793124 = 319499^2 + 97318^2 .

It is not a de Polignac number, because 111550404125 - 2⁸ = 111550403869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3104261 + ... + 3139989.

It is an arithmetic number, because the mean of its divisors is an integer number (8701523415).

Almost surely, 2^111550404125 is an apocalyptic number.

It is an amenable number.

111550404125 is a deficient number, since it is larger than the sum of its proper divisors (27673970515).

111550404125 is an equidigital number, since it uses as much as digits as its factorization.

111550404125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60721 (or 60711 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 111550404125 its reverse (521404055111), we get a palindrome (632954459236).

The spelling of 111550404125 in words is "one hundred eleven billion, five hundred fifty million, four hundred four thousand, one hundred twenty-five".