321212423 has 16 divisors (see below), whose sum is σ = 388907520. Its totient is φ = 259155936.

The previous prime is 321212417. The next prime is 321212453. The reversal of 321212423 is 324212123.

It is a cyclic number.

It is not a de Polignac number, because 321212423 - 2²⁴ = 304435207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321212395 and 321212404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321212413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13190 + ... + 28572.

It is an arithmetic number, because the mean of its divisors is an integer number (24306720).

Almost surely, 2^321212423 is an apocalyptic number.

321212423 is a deficient number, since it is larger than the sum of its proper divisors (67695097).

321212423 is a wasteful number, since it uses less digits than its factorization.

321212423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15566.

The product of its digits is 576, while the sum is 20.

The square root of 321212423 is about 17922.4000345936. The cubic root of 321212423 is about 684.8531292200.

Adding to 321212423 its reverse (324212123), we get a palindrome (645424546).

The spelling of 321212423 in words is "three hundred twenty-one million, two hundred twelve thousand, four hundred twenty-three".