211040123 has 4 divisors (see below), whose sum is σ = 241188720. Its totient is φ = 180891528.

The previous prime is 211040113. The next prime is 211040129. The reversal of 211040123 is 321040112.

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 211040123 - 2¹⁴ = 211023739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211040098 and 211040107.

It is not an unprimeable number, because it can be changed into a prime (211040129) 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, 15074288 + ... + 15074301.

It is an arithmetic number, because the mean of its divisors is an integer number (60297180).

Almost surely, 2^211040123 is an apocalyptic number.

211040123 is a deficient number, since it is larger than the sum of its proper divisors (30148597).

211040123 is an equidigital number, since it uses as much as digits as its factorization.

211040123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30148596.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 211040123 is about 14527.2200713006. The cubic root of 211040123 is about 595.3719144568.

Adding to 211040123 its reverse (321040112), we get a palindrome (532080235).

The spelling of 211040123 in words is "two hundred eleven million, forty thousand, one hundred twenty-three".