211131133223 has 4 divisors (see below), whose sum is σ = 211757635440. Its totient is φ = 210504631008.

The previous prime is 211131133177. The next prime is 211131133253. The reversal of 211131133223 is 322331131112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211131133223 - 2¹⁸ = 211130871079 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 (211131133253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313250603 + ... + 313251276.

It is an arithmetic number, because the mean of its divisors is an integer number (52939408860).

Almost surely, 2^211131133223 is an apocalyptic number.

211131133223 is a deficient number, since it is larger than the sum of its proper divisors (626502217).

211131133223 is an equidigital number, since it uses as much as digits as its factorization.

211131133223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626502216.

The product of its digits is 648, while the sum is 23.

Adding to 211131133223 its reverse (322331131112), we get a palindrome (533462264335).

The spelling of 211131133223 in words is "two hundred eleven billion, one hundred thirty-one million, one hundred thirty-three thousand, two hundred twenty-three".