21212021120000 has 110 divisors (see below), whose sum is σ = 52987199487288. Its totient is φ = 8484808192000.

The previous prime is 21212021119997. The next prime is 21212021120023. The reversal of 21212021120000 is 2112021212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15931892 + ... + 17211891.

Almost surely, 2^{21212021120000} is an apocalyptic number.

21212021120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21212021120000 is an abundant number, since it is smaller than the sum of its proper divisors (31775178367288).

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

21212021120000 is an frugal number, since it uses more digits than its factorization.

21212021120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33143823 (or 33143790 counting only the distinct ones).

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

Adding to 21212021120000 its reverse (2112021212), we get a palindrome (21214133141212).

The spelling of 21212021120000 in words is "twenty-one trillion, two hundred twelve billion, twenty-one million, one hundred twenty thousand".