12211212210212 has 12 divisors (see below), whose sum is σ = 21392330855196. Its totient is φ = 6099117680160.

The previous prime is 12211212210187. The next prime is 12211212210229. The reversal of 12211212210212 is 21201221211221.

It can be written as a sum of positive squares in 2 ways, for example, as 7126475846116 + 5084736364096 = 2669546^2 + 2254936^2 .

It is a super-2 number, since 2×12211212210212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1622102003 + ... + 1622109530.

It is an arithmetic number, because the mean of its divisors is an integer number (1782694237933).

Almost surely, 2^{12211212210212} is an apocalyptic number.

It is an amenable number.

12211212210212 is a deficient number, since it is larger than the sum of its proper divisors (9181118644984).

12211212210212 is a wasteful number, since it uses less digits than its factorization.

12211212210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244212478 (or 3244212476 counting only the distinct ones).

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

Adding to 12211212210212 its reverse (21201221211221), we get a palindrome (33412433421433).

The spelling of 12211212210212 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, two hundred ten thousand, two hundred twelve".