212134430023 has 4 divisors (see below), whose sum is σ = 213435868408. Its totient is φ = 210832991640.

The previous prime is 212134430021. The next prime is 212134430051. The reversal of 212134430023 is 320034431212.

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 212134430023 - 2¹ = 212134430021 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 212134430023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212134430021) 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, 650718948 + ... + 650719273.

It is an arithmetic number, because the mean of its divisors is an integer number (53358967102).

Almost surely, 2^212134430023 is an apocalyptic number.

212134430023 is a deficient number, since it is larger than the sum of its proper divisors (1301438385).

212134430023 is a wasteful number, since it uses less digits than its factorization.

212134430023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301438384.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 212134430023 its reverse (320034431212), we get a palindrome (532168861235).

The spelling of 212134430023 in words is "two hundred twelve billion, one hundred thirty-four million, four hundred thirty thousand, twenty-three".