111611610113 has 8 divisors (see below), whose sum is σ = 114338457576. Its totient is φ = 108884982400.

The previous prime is 111611609999. The next prime is 111611610179. The reversal of 111611610113 is 311016116111.

It can be written as a sum of positive squares in 4 ways, for example, as 327320464 + 111284289649 = 18092^2 + 333593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111611610113 - 2¹² = 111611606017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111611610413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1512995 + ... + 1585047.

It is an arithmetic number, because the mean of its divisors is an integer number (14292307197).

Almost surely, 2^111611610113 is an apocalyptic number.

It is an amenable number.

111611610113 is a deficient number, since it is larger than the sum of its proper divisors (2726847463).

111611610113 is an equidigital number, since it uses as much as digits as its factorization.

111611610113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109875.

The product of its (nonzero) digits is 108, while the sum is 23.

Adding to 111611610113 its reverse (311016116111), we get a palindrome (422627726224).

The spelling of 111611610113 in words is "one hundred eleven billion, six hundred eleven million, six hundred ten thousand, one hundred thirteen".