1321220350444 has 24 divisors (see below), whose sum is σ = 2317573244448. Its totient is φ = 659058368640.

The previous prime is 1321220350391. The next prime is 1321220350451. The reversal of 1321220350444 is 4440530221231.

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, 2719122 + ... + 3167974.

It is an arithmetic number, because the mean of its divisors is an integer number (96565551852).

Almost surely, 2^{1321220350444} is an apocalyptic number.

It is an amenable number.

1321220350444 is a deficient number, since it is larger than the sum of its proper divisors (996352894004).

1321220350444 is a wasteful number, since it uses less digits than its factorization.

1321220350444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450585 (or 450583 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 1321220350444 its reverse (4440530221231), we get a palindrome (5761750571675).

The spelling of 1321220350444 in words is "one trillion, three hundred twenty-one billion, two hundred twenty million, three hundred fifty thousand, four hundred forty-four".