21222122020012 has 12 divisors (see below), whose sum is σ = 37839443979456. Its totient is φ = 10410852311600.

The previous prime is 21222122020007. The next prime is 21222122020019. The reversal of 21222122020012 is 21002022122212.

It is a super-3 number, since 3×21222122020012³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21222122020019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50052174364 + ... + 50052174787.

It is an arithmetic number, because the mean of its divisors is an integer number (3153286998288).

Almost surely, 2^{21222122020012} is an apocalyptic number.

It is an amenable number.

21222122020012 is a deficient number, since it is larger than the sum of its proper divisors (16617321959444).

21222122020012 is a wasteful number, since it uses less digits than its factorization.

21222122020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100104349208 (or 100104349206 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222122020012 its reverse (21002022122212), we get a palindrome (42224144142224).

The spelling of 21222122020012 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-two million, twenty thousand, twelve".