21212122000002 has 32 divisors (see below), whose sum is σ = 42466127204160. Its totient is φ = 7063727893440.

The previous prime is 21212121999983. The next prime is 21212122000049. The reversal of 21212122000002 is 20000022121212.

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, 81401377 + ... + 81661547.

It is an arithmetic number, because the mean of its divisors is an integer number (1327066475130).

Almost surely, 2^{21212122000002} is an apocalyptic number.

21212122000002 is an abundant number, since it is smaller than the sum of its proper divisors (21254005204158).

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

21212122000002 is a wasteful number, since it uses less digits than its factorization.

21212122000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273538.

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

Adding to 21212122000002 its reverse (20000022121212), we get a palindrome (41212144121214).

It can be divided in two parts, 2121212 and 2000002, that multiplied together give a palindrome (4242428242424).

The spelling of 21212122000002 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty-two million, two", and thus it is an aban number.