212134430423 has 4 divisors (see below), whose sum is σ = 212145338088. Its totient is φ = 212123522760.

The previous prime is 212134430383. The next prime is 212134430429. The reversal of 212134430423 is 324034431212.

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 212134430423 - 2²⁰ = 212133381847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212134430429) 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, 5424608 + ... + 5463573.

It is an arithmetic number, because the mean of its divisors is an integer number (53036334522).

Almost surely, 2^212134430423 is an apocalyptic number.

212134430423 is a deficient number, since it is larger than the sum of its proper divisors (10907665).

212134430423 is a wasteful number, since it uses less digits than its factorization.

212134430423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10907664.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 212134430423 its reverse (324034431212), we get a palindrome (536168861635).

The spelling of 212134430423 in words is "two hundred twelve billion, one hundred thirty-four million, four hundred thirty thousand, four hundred twenty-three".