21212330311012 has 24 divisors (see below), whose sum is σ = 37201697084160. Its totient is φ = 10583277123360.

The previous prime is 21212330311009. The next prime is 21212330311061. The reversal of 21212330311012 is 21011303321212.

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 7 ways as a sum of consecutive naturals, for example, 27324483 + ... + 28090069.

It is an arithmetic number, because the mean of its divisors is an integer number (1550070711840).

Almost surely, 2^{21212330311012} is an apocalyptic number.

It is an amenable number.

21212330311012 is a deficient number, since it is larger than the sum of its proper divisors (15989366773148).

21212330311012 is a wasteful number, since it uses less digits than its factorization.

21212330311012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780531 (or 780529 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21212330311012 its reverse (21011303321212), we get a palindrome (42223633632224).

The spelling of 21212330311012 in words is "twenty-one trillion, two hundred twelve billion, three hundred thirty million, three hundred eleven thousand, twelve".