21033021020212 has 12 divisors (see below), whose sum is σ = 36808354569280. Its totient is φ = 10516348286136.

The previous prime is 21033021020117. The next prime is 21033021020237. The reversal of 21033021020212 is 21202012033012.

It is a self number, because there is not a number n which added to its sum of digits gives 21033021020212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40264038 + ... + 40783069.

Almost surely, 2^{21033021020212} is an apocalyptic number.

It is an amenable number.

21033021020212 is a deficient number, since it is larger than the sum of its proper divisors (15775333549068).

21033021020212 is a wasteful number, since it uses less digits than its factorization.

21033021020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81111990 (or 81111988 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21033021020212 its reverse (21202012033012), we get a palindrome (42235033053224).

The spelling of 21033021020212 in words is "twenty-one trillion, thirty-three billion, twenty-one million, twenty thousand, two hundred twelve".