111123031011 has 16 divisors (see below), whose sum is σ = 157037948928. Its totient is φ = 69653865600.

The previous prime is 111123030971. The next prime is 111123031027. The reversal of 111123031011 is 110130321111.

It is not a de Polignac number, because 111123031011 - 2⁶ = 111123030947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111123035011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1048795 + ... + 1149876.

It is an arithmetic number, because the mean of its divisors is an integer number (9814871808).

Almost surely, 2^111123031011 is an apocalyptic number.

111123031011 is a deficient number, since it is larger than the sum of its proper divisors (45914917917).

111123031011 is a wasteful number, since it uses less digits than its factorization.

111123031011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199682.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 111123031011 its reverse (110130321111), we get a palindrome (221253352122).

The spelling of 111123031011 in words is "one hundred eleven billion, one hundred twenty-three million, thirty-one thousand, eleven".