210231013123 has 4 divisors (see below), whose sum is σ = 211570064320. Its totient is φ = 208891961928.

The previous prime is 210231013093. The next prime is 210231013169. The reversal of 210231013123 is 321310132012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210231013123 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 210231013123.

It is not an unprimeable number, because it can be changed into a prime (210231013423) 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, 669525363 + ... + 669525676.

It is an arithmetic number, because the mean of its divisors is an integer number (52892516080).

Almost surely, 2^210231013123 is an apocalyptic number.

210231013123 is a deficient number, since it is larger than the sum of its proper divisors (1339051197).

210231013123 is a wasteful number, since it uses less digits than its factorization.

210231013123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339051196.

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

Adding to 210231013123 its reverse (321310132012), we get a palindrome (531541145135).

The spelling of 210231013123 in words is "two hundred ten billion, two hundred thirty-one million, thirteen thousand, one hundred twenty-three".