212021304 has 128 divisors (see below), whose sum is σ = 623462400. Its totient is φ = 59391360.

The previous prime is 212021239. The next prime is 212021311. The reversal of 212021304 is 403120212.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 215197 + ... + 216179.

It is an arithmetic number, because the mean of its divisors is an integer number (4870800).

Almost surely, 2^212021304 is an apocalyptic number.

212021304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311731200).

212021304 is an abundant number, since it is smaller than the sum of its proper divisors (411441096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212021304 is a wasteful number, since it uses less digits than its factorization.

212021304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212021304 is about 14560.9513425463. The cubic root of 212021304 is about 596.2931683824.

Adding to 212021304 its reverse (403120212), we get a palindrome (615141516).

The spelling of 212021304 in words is "two hundred twelve million, twenty-one thousand, three hundred four".