21212010201200 has 120 divisors (see below), whose sum is σ = 62722282579488. Its totient is φ = 6713251568640.

The previous prime is 21212010201101. The next prime is 21212010201209. The reversal of 21212010201200 is 210201021212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212010201209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291337367 + ... + 291410166.

Almost surely, 2^{21212010201200} is an apocalyptic number.

21212010201200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21212010201200 is an abundant number, since it is smaller than the sum of its proper divisors (41510272378288).

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

21212010201200 is a wasteful number, since it uses less digits than its factorization.

21212010201200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582747571 (or 582747560 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21212010201200 its reverse (210201021212), we get a palindrome (21422211222412).

The spelling of 21212010201200 in words is "twenty-one trillion, two hundred twelve billion, ten million, two hundred one thousand, two hundred".