212221321300 has 36 divisors (see below), whose sum is σ = 460557757660. Its totient is φ = 84881617920.

The previous prime is 212221321289. The next prime is 212221321303. The reversal of 212221321300 is 3123122212.

It can be written as a sum of positive squares in 6 ways, for example, as 4077333316 + 208143987984 = 63854^2 + 456228^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221321303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1251172 + ... + 1410628.

Almost surely, 2^212221321300 is an apocalyptic number.

212221321300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221321300 is an abundant number, since it is smaller than the sum of its proper divisors (248336436360).

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

212221321300 is a wasteful number, since it uses less digits than its factorization.

212221321300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172780 (or 172773 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212221321300 its reverse (3123122212), we get a palindrome (215344443512).

The spelling of 212221321300 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, three hundred".