211001323123 has 4 divisors (see below), whose sum is σ = 211638789688. Its totient is φ = 210363856560.

The previous prime is 211001323121. The next prime is 211001323147. The reversal of 211001323123 is 321323100112.

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 211001323123 - 2¹ = 211001323121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211001323123.

It is not an unprimeable number, because it can be changed into a prime (211001323121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318732786 + ... + 318733447.

It is an arithmetic number, because the mean of its divisors is an integer number (52909697422).

Almost surely, 2^211001323123 is an apocalyptic number.

211001323123 is a deficient number, since it is larger than the sum of its proper divisors (637466565).

211001323123 is an equidigital number, since it uses as much as digits as its factorization.

211001323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637466564.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 211001323123 its reverse (321323100112), we get a palindrome (532324423235).

The spelling of 211001323123 in words is "two hundred eleven billion, one million, three hundred twenty-three thousand, one hundred twenty-three".