111223004518 has 4 divisors (see below), whose sum is σ = 166834506780. Its totient is φ = 55611502258.

The previous prime is 111223004489. The next prime is 111223004579. The reversal of 111223004518 is 815400322111.

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

It is a super-2 number, since 2×111223004518² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27805751128 + ... + 27805751131.

It is an arithmetic number, because the mean of its divisors is an integer number (41708626695).

Almost surely, 2^111223004518 is an apocalyptic number.

111223004518 is a deficient number, since it is larger than the sum of its proper divisors (55611502262).

111223004518 is an equidigital number, since it uses as much as digits as its factorization.

111223004518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55611502261.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 111223004518 its reverse (815400322111), we get a palindrome (926623326629).

The spelling of 111223004518 in words is "one hundred eleven billion, two hundred twenty-three million, four thousand, five hundred eighteen".