212144213423 has 4 divisors (see below), whose sum is σ = 223309698360. Its totient is φ = 200978728488.

The previous prime is 212144213401. The next prime is 212144213441. The reversal of 212144213423 is 324312441212.

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 212144213423 - 2²⁰ = 212143164847 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 (212144213473) 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, 5582742440 + ... + 5582742477.

It is an arithmetic number, because the mean of its divisors is an integer number (55827424590).

Almost surely, 2^212144213423 is an apocalyptic number.

212144213423 is a deficient number, since it is larger than the sum of its proper divisors (11165484937).

212144213423 is a wasteful number, since it uses less digits than its factorization.

212144213423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11165484936.

The product of its digits is 9216, while the sum is 29.

Adding to 212144213423 its reverse (324312441212), we get a palindrome (536456654635).

The spelling of 212144213423 in words is "two hundred twelve billion, one hundred forty-four million, two hundred thirteen thousand, four hundred twenty-three".