12212110221212 has 24 divisors (see below), whose sum is σ = 23856215319552. Its totient is φ = 5421867116400.

The previous prime is 12212110221211. The next prime is 12212110221257. The reversal of 12212110221212 is 21212201121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212110221211) 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, 3227299964 + ... + 3227303747.

It is an arithmetic number, because the mean of its divisors is an integer number (994008971648).

Almost surely, 2^{12212110221212} is an apocalyptic number.

It is an amenable number.

12212110221212 is a deficient number, since it is larger than the sum of its proper divisors (11644105098340).

12212110221212 is a wasteful number, since it uses less digits than its factorization.

12212110221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454603769 (or 6454603767 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12212110221212 its reverse (21212201121221), we get a palindrome (33424311342433).

Subtracting 12212110221212 from its reverse (21212201121221), we obtain a palindrome (9000090900009).

The spelling of 12212110221212 in words is "twelve trillion, two hundred twelve billion, one hundred ten million, two hundred twenty-one thousand, two hundred twelve".