1221320044344 has 16 divisors (see below), whose sum is σ = 3053300110920. Its totient is φ = 407106681440.

The previous prime is 1221320044271. The next prime is 1221320044349. The reversal of 1221320044344 is 4434400231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221320044349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25444167567 + ... + 25444167614.

Almost surely, 2^{1221320044344} is an apocalyptic number.

It is an amenable number.

1221320044344 is an abundant number, since it is smaller than the sum of its proper divisors (1831980066576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221320044344 is a wasteful number, since it uses less digits than its factorization.

1221320044344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50888335190 (or 50888335186 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 1221320044344 its reverse (4434400231221), we get a palindrome (5655720275565).

The spelling of 1221320044344 in words is "one trillion, two hundred twenty-one billion, three hundred twenty million, forty-four thousand, three hundred forty-four".