21212010211000 has 64 divisors (see below), whose sum is σ = 56726975897280. Its totient is φ = 7272689212800.

The previous prime is 21212010210967. The next prime is 21212010211031. The reversal of 21212010211000 is 11201021212.

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 15 ways as a sum of consecutive naturals, for example, 1515136587 + ... + 1515150586.

It is an arithmetic number, because the mean of its divisors is an integer number (886358998395).

Almost surely, 2^{21212010211000} is an apocalyptic number.

21212010211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21212010211000 is an abundant number, since it is smaller than the sum of its proper divisors (35514965686280).

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

21212010211000 is a wasteful number, since it uses less digits than its factorization.

21212010211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030287201 (or 3030287187 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21212010211000 its reverse (11201021212), we get a palindrome (21223211232212).

The spelling of 21212010211000 in words is "twenty-one trillion, two hundred twelve billion, ten million, two hundred eleven thousand".