21212106300 has 216 divisors, whose sum is σ = 82894611072. Its totient is φ = 4407696000.

The previous prime is 21212106299. The next prime is 21212106323. The reversal of 21212106300 is 360121212.

21212106300 is a `hidden beast` number, since 2 + 1 + 21 + 2 + 10 + 630 + 0 = 666.

It is a super-3 number, since 3×21212106300³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 83746 + ... + 222345.

Almost surely, 2^21212106300 is an apocalyptic number.

21212106300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21212106300 is an abundant number, since it is smaller than the sum of its proper divisors (61682504772).

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

21212106300 is a wasteful number, since it uses less digits than its factorization.

21212106300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306129 (or 306119 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21212106300 its reverse (360121212), we get a palindrome (21572227512).

The spelling of 21212106300 in words is "twenty-one billion, two hundred twelve million, one hundred six thousand, three hundred".