213442444111 has 16 divisors (see below), whose sum is σ = 235572392160. Its totient is φ = 192132679680.

The previous prime is 213442444109. The next prime is 213442444177. The reversal of 213442444111 is 111444244312.

It is a cyclic number.

It is not a de Polignac number, because 213442444111 - 2¹ = 213442444109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213442444211) 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, 1123420 + ... + 1299598.

It is an arithmetic number, because the mean of its divisors is an integer number (14723274510).

Almost surely, 2^213442444111 is an apocalyptic number.

213442444111 is a deficient number, since it is larger than the sum of its proper divisors (22129948049).

213442444111 is a wasteful number, since it uses less digits than its factorization.

213442444111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178506.

The product of its digits is 12288, while the sum is 31.

Adding to 213442444111 its reverse (111444244312), we get a palindrome (324886688423).

The spelling of 213442444111 in words is "two hundred thirteen billion, four hundred forty-two million, four hundred forty-four thousand, one hundred eleven".