211331303312123 has 4 divisors (see below), whose sum is σ = 216485725344168. Its totient is φ = 206176881280080.

The previous prime is 211331303312117. The next prime is 211331303312147. The reversal of 211331303312123 is 321213303133112.

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 211331303312123 - 2⁴⁶ = 140962559134459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211331303311123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2577211015961 + ... + 2577211016042.

It is an arithmetic number, because the mean of its divisors is an integer number (54121431336042).

Almost surely, 2^{211331303312123} is an apocalyptic number.

211331303312123 is a deficient number, since it is larger than the sum of its proper divisors (5154422032045).

211331303312123 is an equidigital number, since it uses as much as digits as its factorization.

211331303312123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154422032044.

The product of its (nonzero) digits is 5832, while the sum is 29.

Adding to 211331303312123 its reverse (321213303133112), we get a palindrome (532544606445235).

The spelling of 211331303312123 in words is "two hundred eleven trillion, three hundred thirty-one billion, three hundred three million, three hundred twelve thousand, one hundred twenty-three".