21222011202212 has 24 divisors (see below), whose sum is σ = 37158646902720. Its totient is φ = 10605256270560.

The previous prime is 21222011202187. The next prime is 21222011202241. The reversal of 21222011202212 is 21220211022212.

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, 65600714 + ... + 65923422.

It is an arithmetic number, because the mean of its divisors is an integer number (1548276954280).

Almost surely, 2^{21222011202212} is an apocalyptic number.

It is an amenable number.

21222011202212 is a deficient number, since it is larger than the sum of its proper divisors (15936635700508).

21222011202212 is a wasteful number, since it uses less digits than its factorization.

21222011202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331571 (or 331569 counting only the distinct ones).

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

Adding to 21222011202212 its reverse (21220211022212), we get a palindrome (42442222224424).

The spelling of 21222011202212 in words is "twenty-one trillion, two hundred twenty-two billion, eleven million, two hundred two thousand, two hundred twelve".