12222222001212 has 12 divisors (see below), whose sum is σ = 28518518002856. Its totient is φ = 4074074000400.

The previous prime is 12222222001183. The next prime is 12222222001229. The reversal of 12222222001212 is 21210022222221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×12222222001212² (a number of 27 digits) contains 22 as substring.

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, 509259250039 + ... + 509259250062.

Almost surely, 2^{12222222001212} is an apocalyptic number.

12222222001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12222222001212 is an abundant number, since it is smaller than the sum of its proper divisors (16296296001644).

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

12222222001212 is a wasteful number, since it uses less digits than its factorization.

12222222001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018518500108 (or 1018518500106 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12222222001212 its reverse (21210022222221), we get a palindrome (33432244223433).

The spelling of 12222222001212 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty-two million, one thousand, two hundred twelve".