21001220010212 has 24 divisors (see below), whose sum is σ = 39616455942336. Its totient is φ = 9683752337568.

The previous prime is 21001220010203. The next prime is 21001220010227. The reversal of 21001220010212 is 21201002210012.

21001220010212 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 189911618 + ... + 190022169.

It is an arithmetic number, because the mean of its divisors is an integer number (1650685664264).

Almost surely, 2^{21001220010212} is an apocalyptic number.

It is an amenable number.

21001220010212 is a deficient number, since it is larger than the sum of its proper divisors (18615235932124).

21001220010212 is a wasteful number, since it uses less digits than its factorization.

21001220010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379934867 (or 379934865 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21001220010212 its reverse (21201002210012), we get a palindrome (42202222220224).

The spelling of 21001220010212 in words is "twenty-one trillion, one billion, two hundred twenty million, ten thousand, two hundred twelve".