1221321036322 has 16 divisors (see below), whose sum is σ = 1843290307872. Its totient is φ = 606891216960.

The previous prime is 1221321036289. The next prime is 1221321036379. The reversal of 1221321036322 is 2236301231221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11448513 + ... + 11554699.

It is an arithmetic number, because the mean of its divisors is an integer number (115205644242).

Almost surely, 2^{1221321036322} is an apocalyptic number.

1221321036322 is a deficient number, since it is larger than the sum of its proper divisors (621969271550).

1221321036322 is a wasteful number, since it uses less digits than its factorization.

1221321036322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141633.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 1221321036322 its reverse (2236301231221), we get a palindrome (3457622267543).

The spelling of 1221321036322 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-one million, thirty-six thousand, three hundred twenty-two".