210003123031123 has 4 divisors (see below), whose sum is σ = 215125150422168. Its totient is φ = 204881095640080.

The previous prime is 210003123031027. The next prime is 210003123031181. The reversal of 210003123031123 is 321130321300012.

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-210003123031123 is a prime.

It is a super-2 number, since 2×210003123031123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210003123031094 and 210003123031103.

It is not an unprimeable number, because it can be changed into a prime (210003123031423) 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, 2561013695461 + ... + 2561013695542.

It is an arithmetic number, because the mean of its divisors is an integer number (53781287605542).

Almost surely, 2^{210003123031123} is an apocalyptic number.

210003123031123 is a deficient number, since it is larger than the sum of its proper divisors (5122027391045).

210003123031123 is an equidigital number, since it uses as much as digits as its factorization.

210003123031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122027391044.

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

Adding to 210003123031123 its reverse (321130321300012), we get a palindrome (531133444331135).

The spelling of 210003123031123 in words is "two hundred ten trillion, three billion, one hundred twenty-three million, thirty-one thousand, one hundred twenty-three".