20021212010212 has 12 divisors (see below), whose sum is σ = 40042424020480. Its totient is φ = 8580519432936.

The previous prime is 20021212010209. The next prime is 20021212010251. The reversal of 20021212010212 is 21201021212002.

It is a happy number.

20021212010212 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 357521643012 + ... + 357521643067.

Almost surely, 2^{20021212010212} is an apocalyptic number.

It is an amenable number.

20021212010212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20021212010212 is a wasteful number, since it uses less digits than its factorization.

20021212010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715043286090 (or 715043286088 counting only the distinct ones).

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

Adding to 20021212010212 its reverse (21201021212002), we get a palindrome (41222233222214).

The spelling of 20021212010212 in words is "twenty trillion, twenty-one billion, two hundred twelve million, ten thousand, two hundred twelve".