21202212210212 has 48 divisors (see below), whose sum is σ = 40590531744000. Its totient is φ = 9610334566560.

The previous prime is 21202212210211. The next prime is 21202212210229. The reversal of 21202212210212 is 21201221220212.

It is a super-3 number, since 3×21202212210212³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21202212210211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102671039 + ... + 102877337.

It is an arithmetic number, because the mean of its divisors is an integer number (845636078000).

Almost surely, 2^{21202212210212} is an apocalyptic number.

21202212210212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21202212210212 is a deficient number, since it is larger than the sum of its proper divisors (19388319533788).

21202212210212 is a wasteful number, since it uses less digits than its factorization.

21202212210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212856 (or 212854 counting only the distinct ones).

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

Adding to 21202212210212 its reverse (21201221220212), we get a palindrome (42403433430424).

The spelling of 21202212210212 in words is "twenty-one trillion, two hundred two billion, two hundred twelve million, two hundred ten thousand, two hundred twelve".