12221210021212 has 24 divisors (see below), whose sum is σ = 22599485798400. Its totient is φ = 5770940116656.

The previous prime is 12221210021203. The next prime is 12221210021219. The reversal of 12221210021212 is 21212001212221.

It is a super-2 number, since 2×12221210021212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12221210021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221210021219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840747412 + ... + 840761947.

It is an arithmetic number, because the mean of its divisors is an integer number (941645241600).

Almost surely, 2^{12221210021212} is an apocalyptic number.

It is an amenable number.

12221210021212 is a deficient number, since it is larger than the sum of its proper divisors (10378275777188).

12221210021212 is a wasteful number, since it uses less digits than its factorization.

12221210021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681509465 (or 1681509463 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12221210021212 its reverse (21212001212221), we get a palindrome (33433211233433).

The spelling of 12221210021212 in words is "twelve trillion, two hundred twenty-one billion, two hundred ten million, twenty-one thousand, two hundred twelve".