212123430342443 has 4 divisors (see below), whose sum is σ = 212615596074528. Its totient is φ = 211631264610360.

The previous prime is 212123430342431. The next prime is 212123430342449. The reversal of 212123430342443 is 344243034321212.

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 212123430342443 - 2¹⁶ = 212123430276907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212123430342397 and 212123430342406.

It is not an unprimeable number, because it can be changed into a prime (212123430342449) 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, 246082865396 + ... + 246082866257.

It is an arithmetic number, because the mean of its divisors is an integer number (53153899018632).

Almost surely, 2^{212123430342443} is an apocalyptic number.

212123430342443 is a deficient number, since it is larger than the sum of its proper divisors (492165732085).

212123430342443 is an equidigital number, since it uses as much as digits as its factorization.

212123430342443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492165732084.

The product of its (nonzero) digits is 331776, while the sum is 38.

Adding to 212123430342443 its reverse (344243034321212), we get a palindrome (556366464663655).

The spelling of 212123430342443 in words is "two hundred twelve trillion, one hundred twenty-three billion, four hundred thirty million, three hundred forty-two thousand, four hundred forty-three".