111444404213 has 32 divisors (see below), whose sum is σ = 121813372800. Its totient is φ = 101561923584.

The previous prime is 111444404209. The next prime is 111444404249. The reversal of 111444404213 is 312404444111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111444404213 - 2² = 111444404209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111444404293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24724706 + ... + 24729212.

It is an arithmetic number, because the mean of its divisors is an integer number (3806667900).

Almost surely, 2^111444404213 is an apocalyptic number.

It is an amenable number.

111444404213 is a deficient number, since it is larger than the sum of its proper divisors (10368968587).

111444404213 is a wasteful number, since it uses less digits than its factorization.

111444404213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 111444404213 its reverse (312404444111), we get a palindrome (423848848324).

The spelling of 111444404213 in words is "one hundred eleven billion, four hundred forty-four million, four hundred four thousand, two hundred thirteen".