212324021 has 8 divisors (see below), whose sum is σ = 261321984. Its totient is φ = 167992560.

The previous prime is 212324003. The next prime is 212324081. The reversal of 212324021 is 120423212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212324021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212324081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166525 + ... + 1166706.

It is an arithmetic number, because the mean of its divisors is an integer number (32665248).

Almost surely, 2^212324021 is an apocalyptic number.

It is an amenable number.

212324021 is a deficient number, since it is larger than the sum of its proper divisors (48997963).

212324021 is a wasteful number, since it uses less digits than its factorization.

212324021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333251.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212324021 is about 14571.3424570285. The cubic root of 212324021 is about 596.5768226440.

Adding to 212324021 its reverse (120423212), we get a palindrome (332747233).

The spelling of 212324021 in words is "two hundred twelve million, three hundred twenty-four thousand, twenty-one".