211301223123 has 16 divisors (see below), whose sum is σ = 294000698880. Its totient is φ = 134735297664.

The previous prime is 211301223109. The next prime is 211301223131. The reversal of 211301223123 is 321322103112.

It is not a de Polignac number, because 211301223123 - 2¹⁸ = 211300960979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211301223123.

It is not an unprimeable number, because it can be changed into a prime (211301223163) 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 15 ways as a sum of consecutive naturals, for example, 1330290 + ... + 1480632.

It is an arithmetic number, because the mean of its divisors is an integer number (18375043680).

Almost surely, 2^211301223123 is an apocalyptic number.

211301223123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

211301223123 is a deficient number, since it is larger than the sum of its proper divisors (82699475757).

211301223123 is a wasteful number, since it uses less digits than its factorization.

211301223123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170738.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 211301223123 its reverse (321322103112), we get a palindrome (532623326235).

It can be divided in two parts, 21130 and 1223123, that added together give a triangular number (1244253 = T₁₅₇₇).

The spelling of 211301223123 in words is "two hundred eleven billion, three hundred one million, two hundred twenty-three thousand, one hundred twenty-three".