212423454123 has 16 divisors (see below), whose sum is σ = 283659978240. Its totient is φ = 141401366624.

The previous prime is 212423454101. The next prime is 212423454197. The reversal of 212423454123 is 321454324212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212423454123 - 2¹⁸ = 212423191979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212423454223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16131340 + ... + 16144502.

It is an arithmetic number, because the mean of its divisors is an integer number (17728748640).

Almost surely, 2^212423454123 is an apocalyptic number.

212423454123 is a deficient number, since it is larger than the sum of its proper divisors (71236524117).

212423454123 is a wasteful number, since it uses less digits than its factorization.

212423454123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20898.

The product of its digits is 46080, while the sum is 33.

Adding to 212423454123 its reverse (321454324212), we get a palindrome (533877778335).

The spelling of 212423454123 in words is "two hundred twelve billion, four hundred twenty-three million, four hundred fifty-four thousand, one hundred twenty-three".