1221302132212 has 12 divisors (see below), whose sum is σ = 2210977998180. Its totient is φ = 589594132736.

The previous prime is 1221302132189. The next prime is 1221302132231. The reversal of 1221302132212 is 2122312031221.

It can be written as a sum of positive squares in 2 ways, for example, as 584252324496 + 637049807716 = 764364^2 + 798154^2 .

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, 5264233213 + ... + 5264233444.

It is an arithmetic number, because the mean of its divisors is an integer number (184248166515).

Almost surely, 2^{1221302132212} is an apocalyptic number.

It is an amenable number.

1221302132212 is a deficient number, since it is larger than the sum of its proper divisors (989675865968).

1221302132212 is a wasteful number, since it uses less digits than its factorization.

1221302132212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10528466690 (or 10528466688 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1221302132212 its reverse (2122312031221), we get a palindrome (3343614163433).

The spelling of 1221302132212 in words is "one trillion, two hundred twenty-one billion, three hundred two million, one hundred thirty-two thousand, two hundred twelve".