111005005505 has 4 divisors (see below), whose sum is σ = 133206006612. Its totient is φ = 88804004400.

The previous prime is 111005005493. The next prime is 111005005571. The reversal of 111005005505 is 505500500111.

It is a happy number.

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 59274232369 + 51730773136 = 243463^2 + 227444^2 .

It is not a de Polignac number, because 111005005505 - 2³⁰ = 109931263681 is a prime.

It is a super-2 number, since 2×111005005505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon 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, 11100500546 + ... + 11100500555.

It is an arithmetic number, because the mean of its divisors is an integer number (33301501653).

Almost surely, 2^111005005505 is an apocalyptic number.

It is an amenable number.

111005005505 is a deficient number, since it is larger than the sum of its proper divisors (22201001107).

111005005505 is an equidigital number, since it uses as much as digits as its factorization.

111005005505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22201001106.

The product of its (nonzero) digits is 625, while the sum is 23.

Adding to 111005005505 its reverse (505500500111), we get a palindrome (616505505616).

The spelling of 111005005505 in words is "one hundred eleven billion, five million, five thousand, five hundred five".