111205404361 has 4 divisors (see below), whose sum is σ = 117058320400. Its totient is φ = 105352488324.

The previous prime is 111205404337. The next prime is 111205404383. The reversal of 111205404361 is 163404502111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 163404502111 = 3863 ⋅42299897.

It is a cyclic number.

It is not a de Polignac number, because 111205404361 - 2⁵ = 111205404329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111205408361) 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, 2926457991 + ... + 2926458028.

It is an arithmetic number, because the mean of its divisors is an integer number (29264580100).

Almost surely, 2^111205404361 is an apocalyptic number.

It is an amenable number.

111205404361 is a deficient number, since it is larger than the sum of its proper divisors (5852916039).

111205404361 is an equidigital number, since it uses as much as digits as its factorization.

111205404361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852916038.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 111205404361 its reverse (163404502111), we get a palindrome (274609906472).

The spelling of 111205404361 in words is "one hundred eleven billion, two hundred five million, four hundred four thousand, three hundred sixty-one".