211111131223 has 8 divisors (see below), whose sum is σ = 215912223648. Its totient is φ = 206340330144.

The previous prime is 211111131193. The next prime is 211111131323. The reversal of 211111131223 is 322131111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211111131223 - 2¹³ = 211111123031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211111131223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111131323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7558740 + ... + 7586617.

It is an arithmetic number, because the mean of its divisors is an integer number (26989027956).

Almost surely, 2^211111131223 is an apocalyptic number.

211111131223 is a deficient number, since it is larger than the sum of its proper divisors (4801092425).

211111131223 is a wasteful number, since it uses less digits than its factorization.

211111131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15145673.

The product of its digits is 72, while the sum is 19.

Adding to 211111131223 its reverse (322131111112), we get a palindrome (533242242335).

The spelling of 211111131223 in words is "two hundred eleven billion, one hundred eleven million, one hundred thirty-one thousand, two hundred twenty-three".