111024145409 has 4 divisors (see below), whose sum is σ = 111303803604. Its totient is φ = 110744487216.

The previous prime is 111024145381. The next prime is 111024145417. The reversal of 111024145409 is 904541420111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31852254784 + 79171890625 = 178472^2 + 281375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111024145409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111024145439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139828502 + ... + 139829295.

It is an arithmetic number, because the mean of its divisors is an integer number (27825950901).

Almost surely, 2^111024145409 is an apocalyptic number.

It is an amenable number.

111024145409 is a deficient number, since it is larger than the sum of its proper divisors (279658195).

111024145409 is an equidigital number, since it uses as much as digits as its factorization.

111024145409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279658194.

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 111024145409 in words is "one hundred eleven billion, twenty-four million, one hundred forty-five thousand, four hundred nine".