12001221212202 has 64 divisors (see below), whose sum is σ = 27012037478400. Its totient is φ = 3998420786304.

The previous prime is 12001221212173. The next prime is 12001221212291. The reversal of 12001221212202 is 20221212210021.

It is a happy number.

12001221212202 is a `hidden beast` number, since 1 + 200 + 1 + 221 + 21 + 220 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8142199 + ... + 9502517.

It is an arithmetic number, because the mean of its divisors is an integer number (422063085600).

Almost surely, 2^{12001221212202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12001221212202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13506018739200).

12001221212202 is an abundant number, since it is smaller than the sum of its proper divisors (15010816266198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12001221212202 is an equidigital number, since it uses as much as digits as its factorization.

12001221212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362359 (or 1362341 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12001221212202 its reverse (20221212210021), we get a palindrome (32222433422223).

The spelling of 12001221212202 in words is "twelve trillion, one billion, two hundred twenty-one million, two hundred twelve thousand, two hundred two".