20212120011212 has 72 divisors (see below), whose sum is σ = 36468309222576. Its totient is φ = 9798824880000.

The previous prime is 20212120011173. The next prime is 20212120011221. The reversal of 20212120011212 is 21211002121202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 728797298 + ... + 728825030.

It is an arithmetic number, because the mean of its divisors is an integer number (506504294758).

Almost surely, 2^{20212120011212} is an apocalyptic number.

It is an amenable number.

20212120011212 is a deficient number, since it is larger than the sum of its proper divisors (16256189211364).

20212120011212 is a wasteful number, since it uses less digits than its factorization.

20212120011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28231 (or 28078 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20212120011212 its reverse (21211002121202), we get a palindrome (41423122132414).

The spelling of 20212120011212 in words is "twenty trillion, two hundred twelve billion, one hundred twenty million, eleven thousand, two hundred twelve".