212221300 has 18 divisors (see below), whose sum is σ = 460520438. Its totient is φ = 84888480.

The previous prime is 212221277. The next prime is 212221327. The reversal of 212221300 is 3122212.

It can be written as a sum of positive squares in 3 ways, for example, as 48944016 + 163277284 = 6996^2 + 12778^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1061007 + ... + 1061206.

Almost surely, 2^212221300 is an apocalyptic number.

212221300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221300 is an abundant number, since it is smaller than the sum of its proper divisors (248299138).

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

212221300 is a wasteful number, since it uses less digits than its factorization.

212221300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122227 (or 2122220 counting only the distinct ones).

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

The square root of 212221300 is about 14567.8172695843. The cubic root of 212221300 is about 596.4806004445.

Adding to 212221300 its reverse (3122212), we get a palindrome (215343512).

It can be divided in two parts, 212221 and 300, that added together give a square (212521 = 461²).

The spelling of 212221300 in words is "two hundred twelve million, two hundred twenty-one thousand, three hundred".