12011221221212 has 6 divisors (see below), whose sum is σ = 21019637137128. Its totient is φ = 6005610610604.

The previous prime is 12011221221133. The next prime is 12011221221229. The reversal of 12011221221212 is 21212212211021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1501402652648 + ... + 1501402652655.

It is an arithmetic number, because the mean of its divisors is an integer number (3503272856188).

Almost surely, 2^{12011221221212} is an apocalyptic number.

It is an amenable number.

12011221221212 is a deficient number, since it is larger than the sum of its proper divisors (9008415915916).

12011221221212 is a wasteful number, since it uses less digits than its factorization.

12011221221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002805305307 (or 3002805305305 counting only the distinct ones).

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

Adding to 12011221221212 its reverse (21212212211021), we get a palindrome (33223433432233).

The spelling of 12011221221212 in words is "twelve trillion, eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".