211123 has 8 divisors (see below), whose sum is σ = 244080. Its totient is φ = 180480.

The previous prime is 211097. The next prime is 211129. The reversal of 211123 is 321112.

211123 is nontrivially palindromic in base 4.

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 211123 - 2¹³ = 202931 is a prime.

It is a super-2 number, since 2×211123² = 89145842258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211129) 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, 378 + ... + 751.

It is an arithmetic number, because the mean of its divisors is an integer number (30510).

2²¹¹¹²³ is an apocalyptic number.

211123 is a deficient number, since it is larger than the sum of its proper divisors (32957).

211123 is a wasteful number, since it uses less digits than its factorization.

211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157.

The product of its digits is 12, while the sum is 10.

The square root of 211123 is about 459.4812292140. The cubic root of 211123 is about 59.5449839892.

Adding to 211123 its reverse (321112), we get a palindrome (532235).

It can be divided in two parts, 21112 and 3, that multiplied together give a palindrome (63336).

The spelling of 211123 in words is "two hundred eleven thousand, one hundred twenty-three", and thus it is an iban number.