211231103123 has 4 divisors (see below), whose sum is σ = 212576524320. Its totient is φ = 209885681928.

The previous prime is 211231103107. The next prime is 211231103129. The reversal of 211231103123 is 321301132112.

It is a happy number.

211231103123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211231103123 - 2⁴ = 211231103107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211231103095 and 211231103104.

It is not an unprimeable number, because it can be changed into a prime (211231103129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672710363 + ... + 672710676.

It is an arithmetic number, because the mean of its divisors is an integer number (53144131080).

Almost surely, 2^211231103123 is an apocalyptic number.

211231103123 is a deficient number, since it is larger than the sum of its proper divisors (1345421197).

211231103123 is a wasteful number, since it uses less digits than its factorization.

211231103123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345421196.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 211231103123 its reverse (321301132112), we get a palindrome (532532235235).

The spelling of 211231103123 in words is "two hundred eleven billion, two hundred thirty-one million, one hundred three thousand, one hundred twenty-three".