21020222112212 has 24 divisors (see below), whose sum is σ = 37170115067232. Its totient is φ = 10400304164000.

The previous prime is 21020222112187. The next prime is 21020222112247. The reversal of 21020222112212 is 21221122202012.

It is a super-3 number, since 3×21020222112212³ (a number of 41 digits) contains 333 as substring.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 13633418 + ... + 15096705.

It is an arithmetic number, because the mean of its divisors is an integer number (1548754794468).

Almost surely, 2^{21020222112212} is an apocalyptic number.

It is an amenable number.

21020222112212 is a deficient number, since it is larger than the sum of its proper divisors (16149892955020).

21020222112212 is a wasteful number, since it uses less digits than its factorization.

21020222112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28732039 (or 28732037 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21020222112212 its reverse (21221122202012), we get a palindrome (42241344314224).

The spelling of 21020222112212 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twelve".