213301312123 has 4 divisors (see below), whose sum is σ = 213934254040. Its totient is φ = 212668370208.

The previous prime is 213301312109. The next prime is 213301312129. The reversal of 213301312123 is 321213103312.

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 213301312123 - 2¹³ = 213301303931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213301312094 and 213301312103.

It is not an unprimeable number, because it can be changed into a prime (213301312129) 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, 316470453 + ... + 316471126.

It is an arithmetic number, because the mean of its divisors is an integer number (53483563510).

Almost surely, 2^213301312123 is an apocalyptic number.

213301312123 is a deficient number, since it is larger than the sum of its proper divisors (632941917).

213301312123 is an equidigital number, since it uses as much as digits as its factorization.

213301312123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632941916.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213301312123 its reverse (321213103312), we get a palindrome (534514415435).

The spelling of 213301312123 in words is "two hundred thirteen billion, three hundred one million, three hundred twelve thousand, one hundred twenty-three".