21120202010212 has 24 divisors (see below), whose sum is σ = 37409693469120. Its totient is φ = 10432267982880.

The previous prime is 21120202010123. The next prime is 21120202010213. The reversal of 21120202010212 is 21201020202112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21120202010213) by changing a digit.

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, 68573739 + ... + 68881042.

It is an arithmetic number, because the mean of its divisors is an integer number (1558737227880).

Almost surely, 2^{21120202010212} is an apocalyptic number.

It is an amenable number.

21120202010212 is a deficient number, since it is larger than the sum of its proper divisors (16289491458908).

21120202010212 is a wasteful number, since it uses less digits than its factorization.

21120202010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137455251 (or 137455249 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120202010212 its reverse (21201020202112), we get a palindrome (42321222212324).

The spelling of 21120202010212 in words is "twenty-one trillion, one hundred twenty billion, two hundred two million, ten thousand, two hundred twelve".