111503902085 has 4 divisors (see below), whose sum is σ = 133804682508. Its totient is φ = 89203121664.

The previous prime is 111503902079. The next prime is 111503902117. The reversal of 111503902085 is 580209305111.

It is a Cunningham number, because it is equal to 333922²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580209305111 = 2753 ⋅210755287.

It can be written as a sum of positive squares in 2 ways, for example, as 40141725316 + 71362176769 = 200354^2 + 267137^2 .

It is a cyclic number.

It is not a de Polignac number, because 111503902085 - 2³⁶ = 42784425349 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 11150390204 + ... + 11150390213.

It is an arithmetic number, because the mean of its divisors is an integer number (33451170627).

Almost surely, 2^111503902085 is an apocalyptic number.

It is an amenable number.

111503902085 is a deficient number, since it is larger than the sum of its proper divisors (22300780423).

111503902085 is an equidigital number, since it uses as much as digits as its factorization.

111503902085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22300780422.

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 111503902085 in words is "one hundred eleven billion, five hundred three million, nine hundred two thousand, eighty-five".