111405344125 has 16 divisors (see below), whose sum is σ = 141657158448. Its totient is φ = 87442680000.

The previous prime is 111405344041. The next prime is 111405344131. The reversal of 111405344125 is 521443504111.

It can be written as a sum of positive squares in 8 ways, for example, as 5349605881 + 106055738244 = 73141^2 + 325662^2 .

It is not a de Polignac number, because 111405344125 - 2⁹ = 111405343613 is a prime.

It is a super-2 number, since 2×111405344125² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 8401326 + ... + 8414575.

It is an arithmetic number, because the mean of its divisors is an integer number (8853572403).

Almost surely, 2^111405344125 is an apocalyptic number.

It is an amenable number.

111405344125 is a deficient number, since it is larger than the sum of its proper divisors (30251814323).

111405344125 is an equidigital number, since it uses as much as digits as its factorization.

111405344125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16815969 (or 16815959 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 111405344125 its reverse (521443504111), we get a palindrome (632848848236).

The spelling of 111405344125 in words is "one hundred eleven billion, four hundred five million, three hundred forty-four thousand, one hundred twenty-five".