21212120200002 has 64 divisors (see below), whose sum is σ = 43737023775744. Its totient is φ = 6853379742720.

The previous prime is 21212120199971. The next prime is 21212120200049. The reversal of 21212120200002 is 20000202121212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257409318 + ... + 257491710.

It is an arithmetic number, because the mean of its divisors is an integer number (683390996496).

Almost surely, 2^{21212120200002} is an apocalyptic number.

21212120200002 is an abundant number, since it is smaller than the sum of its proper divisors (22524903575742).

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

21212120200002 is a wasteful number, since it uses less digits than its factorization.

21212120200002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86843.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21212120200002 its reverse (20000202121212), we get a palindrome (41212322321214).

The spelling of 21212120200002 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty million, two hundred thousand, two".