212021230 has 16 divisors (see below), whose sum is σ = 389759040. Its totient is φ = 83003872.

The previous prime is 212021213. The next prime is 212021237. The reversal of 212021230 is 32120212.

It is a self number, because there is not a number n which added to its sum of digits gives 212021230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021237) 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, 225085 + ... + 226024.

It is an arithmetic number, because the mean of its divisors is an integer number (24359940).

Almost surely, 2^212021230 is an apocalyptic number.

212021230 is a deficient number, since it is larger than the sum of its proper divisors (177737810).

212021230 is a wasteful number, since it uses less digits than its factorization.

212021230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451163.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212021230 is about 14560.9488015033. The cubic root of 212021230 is about 596.2930990093.

Adding to 212021230 its reverse (32120212), we get a palindrome (244141442).

The spelling of 212021230 in words is "two hundred twelve million, twenty-one thousand, two hundred thirty".