12211001212222 has 24 divisors (see below), whose sum is σ = 18974185238736. Its totient is φ = 5893629713664.

The previous prime is 12211001212217. The next prime is 12211001212229. The reversal of 12211001212222 is 22221210011221.

It is a self number, because there is not a number n which added to its sum of digits gives 12211001212222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211001212229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6618798 + ... + 8260174.

It is an arithmetic number, because the mean of its divisors is an integer number (790591051614).

Almost surely, 2^{12211001212222} is an apocalyptic number.

12211001212222 is a deficient number, since it is larger than the sum of its proper divisors (6763184026514).

12211001212222 is a wasteful number, since it uses less digits than its factorization.

12211001212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645860 (or 1645831 counting only the distinct ones).

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

Adding to 12211001212222 its reverse (22221210011221), we get a palindrome (34432211223443).

The spelling of 12211001212222 in words is "twelve trillion, two hundred eleven billion, one million, two hundred twelve thousand, two hundred twenty-two".