12211121021212 has 12 divisors (see below), whose sum is σ = 21371964418840. Its totient is φ = 6104845472976.

The previous prime is 12211121021167. The next prime is 12211121021261. The reversal of 12211121021212 is 21212012111221.

It is a happy number.

It is a super-2 number, since 2×12211121021212² (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 12211121021212.

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 3 ways as a sum of consecutive naturals, for example, 178720983 + ... + 178789294.

Almost surely, 2^{12211121021212} is an apocalyptic number.

It is an amenable number.

12211121021212 is a deficient number, since it is larger than the sum of its proper divisors (9160843397628).

12211121021212 is a wasteful number, since it uses less digits than its factorization.

12211121021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357518820 (or 357518818 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12211121021212 its reverse (21212012111221), we get a palindrome (33423133132433).

The spelling of 12211121021212 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, twenty-one thousand, two hundred twelve".