21212101000002 has 32 divisors (see below), whose sum is σ = 46285062753024. Its totient is φ = 6427337850000.

The previous prime is 21212101000001. The next prime is 21212101000049. The reversal of 21212101000002 is 20000010121212.

It is a super-3 number, since 3×21212101000002³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21212101000001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13540408 + ... + 15025539.

It is an arithmetic number, because the mean of its divisors is an integer number (1446408211032).

Almost surely, 2^{21212101000002} is an apocalyptic number.

21212101000002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21212101000002 is an abundant number, since it is smaller than the sum of its proper divisors (25072961753022).

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

21212101000002 is a wasteful number, since it uses less digits than its factorization.

21212101000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28577214.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21212101000002 its reverse (20000010121212), we get a palindrome (41212111121214).

The spelling of 21212101000002 in words is "twenty-one trillion, two hundred twelve billion, one hundred one million, two", and thus it is an aban number.