111233123221 has 16 divisors (see below), whose sum is σ = 122484098880. Its totient is φ = 100172350080.

The previous prime is 111233123219. The next prime is 111233123279. The reversal of 111233123221 is 122321332111.

It is not a de Polignac number, because 111233123221 - 2¹ = 111233123219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111233123192 and 111233123201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111233123291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10230430 + ... + 10241296.

It is an arithmetic number, because the mean of its divisors is an integer number (7655256180).

Almost surely, 2^111233123221 is an apocalyptic number.

111233123221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111233123221 is a deficient number, since it is larger than the sum of its proper divisors (11250975659).

111233123221 is a wasteful number, since it uses less digits than its factorization.

111233123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19524.

The product of its digits is 432, while the sum is 22.

Adding to 111233123221 its reverse (122321332111), we get a palindrome (233554455332).

The spelling of 111233123221 in words is "one hundred eleven billion, two hundred thirty-three million, one hundred twenty-three thousand, two hundred twenty-one".