210113203120123 has 4 divisors (see below), whose sum is σ = 210192580985680. Its totient is φ = 210033825254568.

The previous prime is 210113203120069. The next prime is 210113203120133. The reversal of 210113203120123 is 321021302311012.

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-210113203120123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210113203120094 and 210113203120103.

It is not an unprimeable number, because it can be changed into a prime (210113203120133) 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, 39688928808 + ... + 39688934101.

It is an arithmetic number, because the mean of its divisors is an integer number (52548145246420).

Almost surely, 2^{210113203120123} is an apocalyptic number.

210113203120123 is a deficient number, since it is larger than the sum of its proper divisors (79377865557).

210113203120123 is an equidigital number, since it uses as much as digits as its factorization.

210113203120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79377865556.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 210113203120123 its reverse (321021302311012), we get a palindrome (531134505431135).

The spelling of 210113203120123 in words is "two hundred ten trillion, one hundred thirteen billion, two hundred three million, one hundred twenty thousand, one hundred twenty-three".