212113030123 has 4 divisors (see below), whose sum is σ = 212196181648. Its totient is φ = 212029878600.

The previous prime is 212113030117. The next prime is 212113030127. The reversal of 212113030123 is 321030311212.

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-212113030123 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 212113030123.

It is not an unprimeable number, because it can be changed into a prime (212113030127) 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, 41571936 + ... + 41577037.

It is an arithmetic number, because the mean of its divisors is an integer number (53049045412).

Almost surely, 2^212113030123 is an apocalyptic number.

212113030123 is a deficient number, since it is larger than the sum of its proper divisors (83151525).

212113030123 is an equidigital number, since it uses as much as digits as its factorization.

212113030123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83151524.

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

Adding to 212113030123 its reverse (321030311212), we get a palindrome (533143341335).

The spelling of 212113030123 in words is "two hundred twelve billion, one hundred thirteen million, thirty thousand, one hundred twenty-three".