1321442154320 has 20 divisors (see below), whose sum is σ = 3072353008980. Its totient is φ = 528576861696.

The previous prime is 1321442154317. The next prime is 1321442154407. The reversal of 1321442154320 is 234512441231.

It can be written as a sum of positive squares in 2 ways, for example, as 955881646864 + 365560507456 = 977692^2 + 604616^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8259013385 + ... + 8259013544.

It is an arithmetic number, because the mean of its divisors is an integer number (153617650449).

Almost surely, 2^{1321442154320} is an apocalyptic number.

1321442154320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321442154320 is an abundant number, since it is smaller than the sum of its proper divisors (1750910854660).

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

1321442154320 is a wasteful number, since it uses less digits than its factorization.

1321442154320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16518026942 (or 16518026936 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 1321442154320 its reverse (234512441231), we get a palindrome (1555954595551).

The spelling of 1321442154320 in words is "one trillion, three hundred twenty-one billion, four hundred forty-two million, one hundred fifty-four thousand, three hundred twenty".