1221220201322 has 64 divisors (see below), whose sum is σ = 2143861948800. Its totient is φ = 515898720000.

The previous prime is 1221220201309. The next prime is 1221220201337. The reversal of 1221220201322 is 2231020221221.

It is a junction number, because it is equal to n+sod(n) for n = 1221220201294 and 1221220201303.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4469072 + ... + 4734452.

It is an arithmetic number, because the mean of its divisors is an integer number (33497842950).

Almost surely, 2^{1221220201322} is an apocalyptic number.

1221220201322 is a deficient number, since it is larger than the sum of its proper divisors (922641747478).

1221220201322 is a wasteful number, since it uses less digits than its factorization.

1221220201322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265623.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1221220201322 its reverse (2231020221221), we get a palindrome (3452240422543).

The spelling of 1221220201322 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, two hundred one thousand, three hundred twenty-two".