210312112123 has 4 divisors (see below), whose sum is σ = 213759851728. Its totient is φ = 206864372520.

The previous prime is 210312112063. The next prime is 210312112147. The reversal of 210312112123 is 321211213012.

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 210312112123 - 2³⁷ = 72873158651 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 210312112123.

It is not an unprimeable number, because it can be changed into a prime (210312112163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1723869711 + ... + 1723869832.

It is an arithmetic number, because the mean of its divisors is an integer number (53439962932).

Almost surely, 2^210312112123 is an apocalyptic number.

210312112123 is a deficient number, since it is larger than the sum of its proper divisors (3447739605).

210312112123 is an equidigital number, since it uses as much as digits as its factorization.

210312112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447739604.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 210312112123 its reverse (321211213012), we get a palindrome (531523325135).

The spelling of 210312112123 in words is "two hundred ten billion, three hundred twelve million, one hundred twelve thousand, one hundred twenty-three".